[an-ti-bahy-ot-ik, -bee-, an-tee-, -tahy-] 
Biochemistry, Pharmacology| 1. | any 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. |
| 2. | of or involving antibiotics. |
| an·ti·bi·ot·ic (ān'tĭ-bī-ŏt'ĭk, ān'tī-) n. A substance, such as penicillin or streptomycin, produced by or derived from certain fungi, bacteria, and other organisms, that can destroy or inhibit the growth of other microorganisms. Antibiotics are widely used in the prevention and treatment of infectious diseases. adj.
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antibiotic an·ti·bi·ot·ic (ān'tĭ-bī-ŏt'ĭk, ān'tī-)
n.
A substance, such as penicillin or streptomycin, produced by or derived from certain fungi, bacteria, and other organisms, that can destroy or inhibit the growth of other microorganisms. adj.
Of or relating to antibiotics.
Of or relating to antibiosis.
| antibiotic (ān'tĭ-bī-ŏt'ĭk) Pronunciation Key
Noun A substance, such as penicillin, that is capable of destroying or weakening certain microorganisms, especially bacteria or fungi, that cause infections or infectious diseases. Antibiotics are usually produced by or synthesized from other microorganisms, such as molds. They inhibit pathogens by interfering with essential intracellular processes, including the synthesis of bacterial proteins. Antibiotics do not kill viruses and are not effective in treating viral infections. Adjective
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