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WordReference Random House Learner's Dictionary of American English © 2024an•ti•bi•ot•ic /ˌæntɪbaɪˈɑtɪk, -bi-/USA pronunciation n. [countable]- Biochemistrya chemical substance, as penicillin, that can inhibit or destroy the growth of bacteria and other microorganisms.
adj. [before a noun] - Biochemistryof or involving antibiotics:an antibiotic medicine.
an•ti•bi•ot•i•cal•ly, adv. WordReference Random House Unabridged Dictionary of American English © 2024an•ti•bi•ot•ic (an′ti bī ot′ik, -bē-, an′tē-, -tī-),USA pronunciation [Biochem., Pharm.]n. - Biochemistryany of a large group of chemical substances, as penicillin or streptomycin, produced by various microorganisms and fungi, having the capacity in dilute solutions to inhibit the growth of or to destroy bacteria and other microorganisms, used chiefly in the treatment of infectious diseases.
adj. - Biochemistryof or involving antibiotics.
- anti- + biotic 1855–60, for an earlier sense
Collins Concise English Dictionary © HarperCollins Publishers:: antibiotic /ˌæntɪbaɪˈɒtɪk/ n - any of various chemical substances, such as penicillin, streptomycin, chloramphenicol, and tetracycline, produced by various microorganisms, esp fungi, or made synthetically and capable of destroying or inhibiting the growth of microorganisms, esp bacteria
adj - of or relating to antibiotics
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