any of a group of isomeric, antibiotic compounds with the general formula CHNOSR, obtained from the filtrates of certain molds (esp., Penicillium notatum and P. chrysogenum) or produced synthetically
Origin of penicillinfrom penicillium + -in
- An antibiotic drug obtained from molds especially of the genus Penicillium or produced synthetically, available in various preparations and usually used to treat infections caused by gram-positive bacteria.
- Any of a group of broad-spectrum antibiotic drugs, synthetic or semisynthetic, that are derived from penicillin.
Origin of penicillinpenicill(ium) -in
(countable and uncountable, plural penicillins)
Coined by Alexander Fleming after New Latin Penicillium notatum (now Penicillium chrysogenum), a fungus from which penicillin is obtained.