The science which studies the causes and controlling epidemic diseases.
semantic- meaning of a word, phrase, sentence, or text; "a petty argument about semantics"
It means to speak or reply in response to an answer to a question or a person
"Meaning" is the underlying fact, message, or definition of communicated terms. It is often used to indicate that an idea or expression has more than just the superficial or obvious one : a "deeper",...
Lucas means "Light" The origin is Latin.
If it is a girl's it means lucky or fortunateandIf it's a boy's name it means as courageous as a mountain lion
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