antibiotic · noun C /ˌæn.tɪ.baɪˈɒ.tɪk/Full view
antibiotic
C2 a medicine which cures infections by destroying harmful bacteria
Dictionary example:

He is on antibiotics for an ear infection.

Learner example:

Nevertheless, for all the side effects they may have, for all the unpleas[a]ntness of having a needle stuck in your arm or a spoonful of foul-tasting liquid stuck in your mouth, antibiotics and vaccines remain the greatest discovery in the history of the world. (Certificate of Proficiency in English; C2; Italian)

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