Definition of “antibiotic” - English Dictionary

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“antibiotic” in British English

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antibioticnoun [ C ]

uk /ˌæn.ti.baɪˈɒt.ɪk/ us /ˌæn.t̬i.baɪˈɑː.t̬ɪk/

C2 a medicine or chemical that can destroy harmful bacteria in the body or limit their growth:

I'm taking antibiotics for a throat infection.
a one-month course of antibiotics
Some types of antibiotic are used to promote growth in farm animals.
He's on antibiotics for an ear infection.

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(Definition of “antibiotic” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“antibiotic” in American English

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antibioticnoun [ C ]

us /ˌænt·i·bɑɪˈɑt̬·ɪk, ˌæn·tɑɪ-/

a medicine or chemical that can destroy harmful bacteria in the body or limit their growth:

I’m taking an antibiotic for a throat infection.

(Definition of “antibiotic” from the Cambridge Academic Content Dictionary © Cambridge University Press)