Medical Definition of Antimicrobial drugAntimicrobial drug: A drug used to treat a microbial infection. "Antimicrobial" is a general term that refers to a group of drugs that includes antibiotics, antifungals, antiprotozoals, and antivirals. Last Editorial Review: 5/13/2016 Back to MedTerms online medical dictionary A-Z List Need help identifying pills and medications? |


