Some scientific words with the prefix 'bi' are:bicepsbiconcavebiconvexbicuspidbidirectionalbifunctionalbifurcatebilateralbilinearbimodalbiologybiped, bipedalbipodbipolarbiracialbisectbisexualbivalve
bicycle
The answer is "bisect". It's kind of tricky with words that start with "bi".
a scientific word is understatement
Bicycle, Bivalve, biathlon, bifocal, Bituminous.
bibbicyclebickerbikerbistrobillbillfoldbillowbiographybiologicalbiologybishopbirdbibliographybicepbibulousbiasbiasedbicameralbicarbonatebifocalsbidbifurcatebigbigamybighorn sheepbigotbilebikinibilateralbilgebiliousbilkbillablebillboardbillfoldbillhookbingebindbiodiversitybinarybinocularsbingobirchbirthbirthdaybisectbisonbisquebismuthbirthratebirthrightbirthmarkbirthstonebiscottibitebitterbittenbittersweetbiweeklybimonthlybivouacbittybifurcatebittersbitmapbite-sizebizarre
telephone
voltage
AstronomyAnatomy
cat
Biannual means twice a year.
bacteria, bionome