'antibiotic' definitions:

Definition of 'antibiotic'

From: WordNet
adjective
Of or relating to antibiotic drugs
noun
A chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections; "when antibiotics were first discovered they were called wonder drugs" [syn: antibiotic, antibiotic drug]

Synonyms of 'antibiotic'

From: Moby Thesaurus