penicillin

(pen′i silin)

noun

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: < penicillium + -in

See penicillin in American Heritage Dictionary 4

noun
Any of a group of broad-spectrum antibiotic drugs obtained from penicillium molds or produced synthetically, most active against gram-positive bacteria and used in the treatment of various infections and diseases.

Origin:

Origin: penicill(ium)

Origin: + -in

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