Penicillin
Origin
Coined by Alexander Fleming after New Latin (now ), a fungus from which penicillin is obtained.
Full definition of penicillin
Noun
penicillin
(countable and uncountable; plural penicillins)- (pharmaceutical drug) Any of a group of broad-spectrum antibiotics obtained from Penicillium molds or synthesized; they have a beta-lactam structure; most are active against gram-positive bacteria and used in the treatment of various infections and diseases.