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NOUN: absorption
1. (chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid
2. (physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium
3. The social process of absorbing one cultural group into harmony with another
4. The process of absorbing nutrients into the body after digestion
5. Complete attention; intense mental effort
6. The mental state of being preoccupied by something.
MANDY BRICE!
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Wiki User
∙ 9y ago
Wiki User
∙ 13y agoIt is the ratio of the radiant or luminous flux absorbed by a body to the flux falling on it. It was formerly called absorptivity. The absorptance of a black body is one.
Wiki User
∙ 9y agoAbsorptivity is the capability or quality of being absorptive - of being able to absorb.
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What is an absorptance?
An absorptance is a ratio measuring absorbed radiation and incident radiation - to show how well a particular surface absorbs radiation.
What has the author Stuart William Harmer written?
Stuart William Harmer has written: 'Enhanced absorptance photocathodes'
What has the author Curt H Liebert written?
Curt H. Liebert is an author and he has written books on topics such as leadership, business management, and personal growth. Some of his notable works include "Being a Leader with Courage" and "What it Takes to be a Successful Leader."
What happens in absorption transmission and scattering of light?
Reflection is the process by which electromagnetic radiation is returned either at the boundary between two media (surface reflection) or at the interior of a medium (volume reflection), whereas transmission is the passage of electromagnetic radiation through a medium. Both processes can be accompanied by diffusion (also called scattering), which is the process of deflecting a unidirectional beam into many directions. In this case, we speak about diffuse reflection and diffuse transmission (Fig. II.14). When no diffusion occurs, reflection or transmission of an unidirectional beam results in an unidirectional beam according to the laws of geometrical optics (Fig. II.15). In this case, we speak about regular reflection (or specular reflection) and regular transmission(or direct transmission). Reflection, transmission and scattering leave the frequency of the radiation unchanged. Exception: The Doppler effect causes a change in frequency when the reflecting material or surface is in motion.Absorptionis the transformation of radiant power to another type of energy, usually heat, by interaction with matter.Fig. II.14 - a-c: Direct, mixed and diffuse reflection d-f: direct, mixed and diffuse transmissionFig. II.15 - When directly reflected or directly transmitted, an unidirectional beam follows the laws of geometrical optics: direct reflection (left): ain = aout, direct transmission (right): n1 · sin(ain) = n2 · sin(aout) with n1 and n2 denoting the respective medium´s index of refractionII.8.a. Reflectance r, Transmittance t, and AbsorptanceaIn general, reflection, transmission and absorption depend on the wavelength of the affected radiation. Thus, these three processes can either be quantified for monochromatic radiation (in this case, the adjective "spectral" is added to the respective quantity) or for a certain kind of polychromatic radiation. For the latter, the spectral distribution of the incident radiation has to be specified. In addition, reflectance, transmittance and absorptance might also depend on polarization and geometric distribution of the incident radiation, which therefore also have to be specified.Thereflectance r is defined by the ratio of reflected radiant power to incident radiant power. For a certain area element dA of the reflecting surface, the (differential) incident radiant power is given by the surface's irradiance Ee, multiplied with the size of the surface element, thusdFe,incident = Ee dAand the (differential) reflected radiant power is given by the exitance Me, multiplied with the size of the surface element:dFe,reflected = Me dAThus,orMe = r EeTotal reflectance is further subdivided in regular reflectance rr and diffuse reflectancerd, which are given by the ratios of regularly (or specularly) reflected radiant power and diffusely reflected radiant power to incident radiant power. From this definition, it is obvious thatr = rr + rdThe transmittance t of a medium is defined by the ratio of transmitted radiant power to incident radiant power. Total transmittance is further subdivided in regular transmittance tr and diffuse transmittance td, which are given by the ratios of regularly (or directly) transmitted radiant power and diffusely transmitted radiant power to incident radiant power.Again,t = tr + tdThe absorptance a of a medium is defined by the ratio of absorbed radiant power to incident radiant power.Being defined as ratios of radiant power values, reflectance, transmittance and absorptance are dimensionless.Quantities such as reflectance and transmittance are used to describe the optical properties of materials. The quantities can apply to either complex radiation or to monochromatic radiation.The optical properties of materials are not a constant since they are dependent on many parameters such as:• thickness of the sample• surface conditions• angle of incidence• temperature• the spectral composition of the radiation (CIE standard illuminants A, B, C, D65 and other illuminants D)• polarization effectsThe measurement of optical properties of materials using integrating spheres is described in DIN 5036-3 and CIE 130-1998.Descriptions of the principle measurements are presented in paragraph III.1.f below.II.8.b. Radiance coefficient qe, Bidirectional reflectance distribution function (BRDF)The radiance coefficient qe characterizes the directional distribution of diffusely reflected radiation. In detail, the radiance coefficient depends on the direction of the reflected beam and is defined by the ratio of the radiance reflected in this direction to the total incident irradiance. In general, the reflected radiance is not independent from the directional distribution of the incident radiation, which thus has to be specified.In the USA, the concept of Bidirectional reflectance distribution function BRDF is similar to the radiance coefficient. The only difference is that the BRDF is a function of the directions of the incident and the reflected beam (Fig. ). In detail, the (differential) irradiance dEe impinging from a certain direction causes the reflected radiance dLe in another direction, which is given bydLe = BRDF · dEeThis BRDF depends on more arguments than the radiance coefficient. However, its advantage is the simultaneous description of the material's reflection properties for all possible directional distributions of incident radiation, whereas the radiance coefficient generally is valid for just one specific directional distribution of incident radiation.The unit of radiance coefficient and BRDF is 1/steradian. The BRDF is often abbreviated by the Greek letter ñ, which bears the danger of mixing the BRDF up with reflectance (see foregoing paragraph).Fig. II.16 - Geometry used for the definition of the bidirectional reflectance distribution function (BRDF). The BRDF depends on the directions of incident and reflected radiation, which are given by the angles Ji and Jr, which are measured relative to the reflecting surface's normal, and the azimuth angles ji and jr, which are measured in the plane of the reflecting surface.
Whant is the space shuttle made out off?
usually metal or a material that is strong enough to be launchedQuestion: What is the space shuttle made of?The space shuttle orbiter vehicles consist of thousands of parts made from many different materials, however, the main AIRFRAME is made of special grades of aluminum and graphite epoxy and the outer skin is covered in Thermal Protection System (TPS) materials.The TPS consists of various materials applied externally to the outer structural skin of the orbiter to maintain the skin within acceptable temperatures, primarily during the re-entry phase of the mission. The TPS is a passive system consisting of materials selected for stability at high temperatures and weight efficiency. These materials are as follows:- REINFORCED CARBON-CARBON (RCC).RCC fabrication begins with a rayon cloth graphitized and impregnated with a phenolic resin. This impregnated cloth is layed up as a laminate and cured in an autoclave. After being cured, the laminate is pyrolized to convert the resin to carbon. This is then impregnated with furfural alcohol in a vacuum chamber, then cured and pyrolized again to convert the furfural alcohol to carbon. This process is repeated three times until the desired carbon-carbon properties are achieved.- Black HIGH-TEMPERATURE REUSABLE SURFACE INSULATION TILES (HRSI).The HRSI tiles are made of a low-density, high-purity silica 99.8-percent amorphous fiber (fibers derived from common sand, 1 to 2 mils thick) insulation that is made rigid by ceramic bonding. Because 90 percent of the tile is void and the remaining 10 percent is material, the tile weighs approximately 9 pounds per cubic foot. A slurry containing fibers mixed with water is frame-cast to form soft, porous blocks to which a colloidal silica binder solution is added. When it is sintered, a rigid block is produced that is cut into quarters and then machined to the precise dimensions required for individual tiles.HRSI tiles vary in thickness from 1 inch to 5 inches. The variable thickness is determined by the heat load encountered during entry. Generally, the HRSI tiles are thicker at the forward areas of the orbiter and thinner toward the aft end. Except for closeout areas, the HRSI tiles are nominally 6- by 6-inch squares. The HRSI tiles vary in sizes and shapes in the closeout areas on the orbiter. The HRSI tiles withstand on-orbit cold soak conditions, repeated heating and cooling thermal shock and extreme acoustic environments (165 decibels) at launch.For example, an HRSI tile taken from a 2,300 F oven can be immersed in cold water without damage. Surface heat dissipates so quickly that an uncoated tile can be held by its edges with an ungloved hand seconds after removal from the oven while its interior still glows red.The HRSI tiles are coated on the top and sides with a mixture of powdered tetrasilicide and borosilicate glass with a liquid carrier. This material is sprayed on the tile to coating thicknesses of 16 to 18 mils. The coated tiles are then placed in an oven and heated to a temperature of 2,300 F. This results in a black, waterproof glossy coating that has a surface emittance of 0.85 and a solar absorptance of about 0.85. After the ceramic coating heating process, the remaining silica fibers are treated with a silicon resin to provide bulk waterproofing.Note that the tiles cannot withstand airframe load deformation; therefore, stress isolation is necessary between the tiles and the orbiter structure. This isolation is provided by a strain isolation pad (SIP). SIPs isolate the tiles from the orbiter's structural deflections, expansions and acoustic excitation, thereby preventing stress failure in the tiles. The SIPs are thermal isolators made of Nomex felt material supplied in thicknesses of 0.090, 0.115 or 0.160 inch. SIPs are bonded to the tiles, and the SIP and tile assembly is bonded to the orbiter structure by room-temperature vulcanizing (RTV) process.Nomex felt is a basic aramid fiber. The fibers are 2 deniers in fineness, 3 inches long and crimped. They are loaded into a carding machine that untangles the clumps of fibers and combs them to make a tenuous mass of lengthwise-oriented, relatively parallel fibers called a web. The cross-lapped web is fed into a loom, where it is lightly needled into a batt. Generally, two such batts are placed face-to-face and needled together to form felt. The felt then is subjected to a multineedle pass process until the desired strength is reached. The needled felt is calendered to stabilize at a thickness of 0.16 inch to 0.40 inch by passing through heated rollers at selected pressures. The calendered material is heat-set at approximately 500 F to thermally stabilize the felt.The RTV silicon adhesive is applied to the orbiter surface in a layer approximately 0.008 inch thick. The very thin bond line reduces weight and minimizes the thermal expansion at temperatures of 500 F during entry and temperatures below minus 170 F on orbit. The tile/SIP bond is cured at room temperature under pressure applied by vacuum bags.Since the tiles thermally expand or contract very little compared to the orbiter structure, it is necessary to leave gaps of 25 to 65 mils between them to prevent tile-to-tile contact. Nomex felt material insulation is required in the bottom of the gap between tiles. It is referred to as a filler bar. The material, supplied in thicknesses corresponding to the SIPs', is cut into strips 0.75 inch wide and is bonded to the structure. The filler bar is waterproof and temperature-resistant up to approximately 800 F, topside exposure.SIP introduces stress concentrations at the needled fiber bundles. This results in localized failure in the tile just above the RTV bond line. To solve this problem, the inner surface of the tile is densified to distribute the load more uniformly. The densification process was developed from a Ludox ammonia-stabilized binder. When mixed with silica slip particles, it becomes a cement. When mixed with water, it dries to a finished hard surface. A silica-tetraboride coloring agent is mixed with the compound for penetration identification. Several coats of the pigmented Ludox slip slurry are brush-painted on the SIP/tile bond interface and allowed to air-dry for 24 hours. A heat treatment and other processing are done before installation. The densification coating penetrates the tile to a depth of 0.125 inch, and the strength and stiffness of the tile and SIP system are increased by a factor of two.There are two different densities of HRSI tiles. The first weighs 22 pounds per cubic foot and is used in all areas around the nose and main landing gears, nose cap interface, wing leading edge, RCC/HRSI interface, external tank/orbiter umbilical doors, vent doors and vertical stabilizer leading edge. The remaining areas use tiles that weigh 9 pounds per cubic foot.- White ADVANCED FLEXIBLE REUSABLE SURFACE INSULATION BLANKETS (AFRSI).AFRSI consists of a low-density fibrous silica batting that is made up of high-purity silica and 99.8-percent amorphous silica fibers (1 to 2 mils thick). This batting is sandwiched between an outer woven silica high-temperature fabric and an inner woven glass lower temperature fabric. After the composite is sewn with silica thread, it has a quiltlike appearance. The AFRSI blankets are coated with a ceramic collodial silica and high-purity silica fibers (referred to as C-9) that provide endurance. The AFRSI composite density is approximately 8 to 9 pounds per cubic foot and varies in thickness from 0.45 to 0.95 inch. The thickness is determined by the heat load the blanket encounters during entry. The blankets are cut to the planform shape required and bonded directly to the orbiter by RTV silicon adhesive 0.20 inch thick. The very thin glue line reduces weight and minimizes the thermal expansion during temperature changes. The sewn quilted fabric blanket is manufactured by Rockwell in 3- by 3-foot squares of the proper thickness. The direct application of the blankets to the orbiter results in weight reduction, improved reproducibility and durability, reduced fabrication and installation cost, and reduced installation schedule time.- White FELT REUSABLE SURFACE INSULATION (FRSI).FRSI is the same Nomex material as SIP. The FRSI varies in thickness from 0.160 to 0.40 inch depending on the heat load encountered during entry. It consists of sheets 3 to 4 feet square, except for closeout areas, where it is cut to fit. The FRSI is bonded directly to the orbiter by RTV silicon adhesive applied at a thickness of 0.20 inch. A white-pigmented silicon elastomer coating is used to waterproof the felt and provide required thermal and optical properties. The FRSI has an emittance of 0.8 and solar absorptance of 0.32. FRSI covers nearly 50 percent of the orbiter's upper surfaces.For more information, see http://www.nasa.gov/home/index.html
11 letter word starting with an A?
abandonment abbreviated abbreviates abbreviator abdications abdominally abecedarian aberrancies aberrations abhorrences abhorrently abiogeneses abiogenesis abiogenists abiological abiotically abjurations ablutionary abnegations abnormality abolishable abolishment abominating abomination abominators aboriginals abortionist aboveground abracadabra abreactions abridgement abridgments abrogations abscissions absenteeism absolutions absolutisms absolutists absolutized absolutizes absorbances absorbingly absorptance absorptions abstentions abstentious abstinences abstinently abstracters abstractest abstracting abstraction abstractive abstractors abstricting absurdities abusiveness academician academicism acatalectic acaulescent accelerando accelerants accelerated accelerates accelerator accentually accentuated accentuates acceptances acceptation acceptingly accessaries accessional accessioned accessorial accessories accessorise accessorize accidentals accipitrine acclamation acclimating acclimation acclimatise acclimatize acclivities accommodate accompanied accompanies accompanist accomplices accordances accordantly accordingly accoucheurs accountable accountably accountancy accountants accountings accoutering accrediting accruements acculturate accumulated accumulates accumulator accusations accusatives accustoming acerbically acetabulums acetanilide acetanilids acetylating acetylation acetylative achievement achondrites achondritic achromatism achromatize acidimeters acidimetric acidophiles acidophilic acidulating acidulation acknowledge acoelomates acoustician acquainting acquiescent acquiescing acquirement acquisition acquisitive acquisitors acquittance acridnesses acriflavine acrimonious acrocentric acromegalic acropetally acrophobias acropolises acrylamides actinically actinolites actinometer actinometry actinomyces actinomycin activations actomyosins actualities actualizing actuarially acupressure acupuncture acutenesses adaptations adaptedness addressable adenomatous adeptnesses adiposities adjacencies adjectively adjournment adjudicated adjudicates adjudicator adjunctions adjurations adjustments adjutancies admeasuring administers admiralties admirations admittances admonishers admonishing admonitions adolescence adolescents adoptianism adoptionism adoptionist adorability adrenalines adrenalized adsorptions adulterants adulterated adulterates adulterator adultnesses adumbrating adumbration adumbrative advancement advantaging adventitial adventitias adventurers adventuress adventuring adventurism adventurist adventurous adverbially adversarial adversaries adversative adverseness adversities advertences advertently advertisers advertising advertizing advertorial advisements advocations aeciospores aepyornises aerenchymas aerobically aerobicized aerobicizes aerobiology aerobraking aerodynamic aeroelastic aerogrammes aeromedical aeronautics aeronomical aeronomists aerosolized aerosolizes aerostatics aesthetical aestivating aestivation aetiologies affectation affectingly affectional affectioned affectively affectivity afficionado affiliating affiliation affirmances affirmation affirmative affixations afflictions affluencies afforesting affricative affrighting aficionadas aficionados afterbirths afterburner aftereffect afterimages aftermarket afterpieces aftershaves aftershocks aftertastes afterworlds agamospermy agelessness agglomerate agglutinate agglutinins aggradation aggrandised aggrandises aggrandized aggrandizer aggrandizes aggravating aggravation aggregately aggregating aggregation aggregative aggressions aggrievedly agitational agnosticism agonizingly agoraphobes agoraphobia agoraphobic agrarianism agriculture agronomists ahistorical aiguillette ailanthuses ailurophile ailurophobe aimlessness airbrushing airdropping airfreights airlessness airmanships airproofing airsickness airworthier alabastrine albatrosses albuminuria albuminuric alchemistic alchemizing alcoholisms alcyonarian aldosterone alertnesses alexandrine alexandrite algebraists algolagniac algolagnias algological algologists algorithmic alienations aliennesses alightments alikenesses aliteracies alivenesses alkalifying alkalimeter alkalimetry alkalinized alkalinizes alkylations allantoides allegations allegiances allegorical allegorised allegorises allegorists allegorized allegorizer allegorizes allegrettos allelomorph allelopathy alleviating alleviation alleviators alliterated alliterates alloantigen allocatable allocations allocutions allografted allographic allometries allomorphic allopatries allopurinol allosteries allotropies allowancing allurements almsgivings alonenesses aloofnesses alpenstocks alphabeting alphabetize altarpieces altazimuths alterations altercating altercation alternately alternating alternation alternative alternators altimetries altitudinal altocumulus altogethers altostratus aluminizing amalgamated amalgamates amalgamator amantadines amaranthine amaryllises amateurisms amativeness amazonstone ambassadors ambergrises ambiguities ambiguously ambisexuals ambitioning ambitiously ambivalence ambiversion amblygonite ambrosially ambulations ambuscaders ambuscading ambushments ameliorated ameliorates ameliorator ameloblasts amenability amenorrheas amenorrheic amercements amethystine amiableness amicability aminopterin aminopyrine ammoniating ammoniation ammonifying ammunitions amobarbital amoebocytes amontillado amoralities amorousness amorphously amortizable amoxicillin amoxycillin amphetamine amphibolies amphibolite amphibology amphibrachs amphictyony amphimacers amphioxuses amphipathic amphiphiles amphiphilic amphiploids amphiploidy amphisbaena ampicillins amplenesses amputations amusingness amygdaloids amyloidoses amyloidosis amylopectin amyloplasts anabaptisms anachronism anachronous anacoluthic anacoluthon anacreontic anadiploses anadiplosis anaesthesia anaesthetic anagnorises anagnorisis anagramming analemmatic analogizing analogously analphabets analyticity analyzation anaphylaxes anaphylaxis anarchistic anastigmats anastomosed anastomoses anastomosis anastomotic anastrophes anatomising anatomizing ancestoring ancestrally anchoresses anchorwoman anchorwomen anchovettas ancientness ancientries ancillaries andalusites androgynies androgynous anecdotages anecdotally anecdotical anecdotists anemographs anemometers anencephaly anesthesias anesthetics anesthetist anesthetize anfractuous angelfishes angelically angiography angiomatous angioplasty angiosperms angiotensin anglicising anglicizing angrinesses angulations anilinguses animadverts animalcules animalculum animalistic animalities animalizing animateness animosities aniseikonia aniseikonic anisogamies anisogamous anisotropic ankylosaurs annexations annihilated annihilates annihilator anniversary annotations annualizing annulations annunciated annunciates annunciator anodization anointments anomalously anonymities anonymously anophelines anorthosite anovulatory antagonisms antagonists antagonized antagonizes antecedence antecedents antecessors antechamber antechapels antenatally antenuptial antependium antepenults anteverting antheridial antheridium anthocyanin anthologies anthologist anthologize anthracenes anthracites anthracitic anthracnose anthropical anthropoids antialcohol antianxiety antibaryons antibiotics antiboycott antiburglar anticathode anticipants anticipated anticipates anticipator anticruelty anticyclone antidotally antidumping antielitism antielitist antiemetics antifascism antifascist antifashion antifatigue antifoaming antifogging antiforeign antifouling antifreezes antifungals antigravity antiheroine antihunting antijamming antileprosy antileptons antiliberal antilogical antimalaria antimatters antimissile antimitotic antimoderns antimonials antimonides antimusical antinatural antinatures antineutron antinomians antinuclear antinucleon antiobesity antioxidant antiozonant antipathies antiphonals antiphonary antiphonies antiphrases antiphrasis antiplagues antipodeans antipopular antipoverty antiprotons antipyreses antipyresis antipyretic antipyrines antiquarian antiquaries antiquating antiquation antiquities antiracisms antiracists antiradical antirealism antirealist antirrhinum antiscience antisecrecy antiseizure antiseptics antisexists antislavery antismokers antismoking antistories antistrophe antistudent antisubsidy antisuicide antitarnish antithyroid antitobacco antitruster antitumoral antitussive antityphoid antivitamin antiwelfare antiwhaling antiwrinkle antonomasia anxiolytics anxiousness aortography apartmental apartnesses apatosaurus aphetically aphrodisiac apicultural apicultures apishnesses apocalypses apocalyptic apologetics apologising apologizers apologizing apomorphine aponeuroses aponeurosis aponeurotic apophthegms apophyllite aposiopeses aposiopesis aposiopetic apostatised apostatises apostatized apostatizes apostleship apostolates apostrophes apostrophic apotheosize appallingly apparatchik apparatuses apparelling apparitions appealingly appearances appeasement appellation appellative apperceived apperceives appertained appetencies applaudable applaudably applesauces application applicative applicators applicatory appliqueing appointment apportioned appositions appositives appreciable appreciably appreciated appreciates appreciator apprehended apprenticed apprentices appressoria approaching approbating approbation approbatory appropriate approvingly approximate appurtenant apriorities aptitudinal aquaculture aquamarines aquaplaners aquaplaning aquarellist aquatically aquatinters aquatinting aquatintist aquiculture arabicizing arabilities arabinoside arbitragers arbitrageur arbitraging arbitrament arbitrarily arbitrating arbitration arbitrative arbitrators arborescent arborvitaes arboviruses archaeology archaically archangelic archbishops archdeacons archdiocese archduchess archduchies archdukedom archegonial archegonium archenemies archenteron archesporia archipelago architraves archpriests arctangents arduousness arenicolous areocentric argumentive aristocracy aristocrats arithmetics aromaticity aromatizing arpeggiated arpeggiates arraignment arrangement arrestingly arrestments arrhythmias arrogations arteriogram arteritides arteritises arthralgias arthritides arthrodeses arthrodesis arthropathy arthropodan arthroscope arthroscopy arthrospore articulable articulated articulates articulator artifactual artilleries artillerist artiodactyl artisanship artlessness asafoetidas ascendances ascendantly ascendences ascensional ascertained ascetically asceticisms ascomycetes ascriptions aseptically asininities askewnesses asparagines aspergillum aspergillus asphaltites asphyxiated asphyxiates aspidistras aspirations assassinate assemblages assemblyman assemblymen assentation assertively assessments asseverated asseverates assiduities assiduously assignation assignments assimilable assimilated assimilates assimilator assistances associating association associative assoilments assortative assortments assuagement assumptions assuredness asterisking astigmatics astigmatism astonishing astringency astringents astrocytoma astrologers astrologies astrometric astronautic astronomers astronomies asymmetries atelectases atelectasis atheistical atherogenic athleticism athwartship atmosphered atmospheres atmospheric atomization atonalities atrabilious atrociously attachments attainments attempering attemptable attendances attentional attentively attenuating attenuation attenuators attestation attitudinal attornments attractance attractancy attractants attractions attributing attribution attributive attritional attunements atypicality auctioneers audaciously audiologies audiologist audiometers audiometric audiophiles audiovisual auditioning auditoriums auscultated auscultates austereness austerities autarchical authoresses authorising authorities authorizers authorizing authorships autocephaly autochthons autoclaving autocracies autocrosses autodidacts autoerotism autografted autographed autographic autoloading autolysates autolyzates automatable automations automatisms automatists automatized automatizes automobiled automobiles autonomists autorotated autorotates autosomally autostradas autosuggest autotomized autotomizes autotrophic autoworkers auxiliaries auxotrophic avalanching aventurines averageness avgolemonos avicultures avocational avoirdupois avouchments avuncularly awarenesses awesomeness awestricken awfulnesses awkwardness axiological axiomatized axiomatizes axisymmetry axonometric azimuthally azoospermia azotobacter
What are words that have the root term?
verb decisive
