Any of various red antibiotics isolated from soil bacteria

Wiktionary Word definitions in Wiktionary
n. (context protein pharmaceutical drug English) Any of a class of toxic polypeptide antibiotics found in soil bacteria of genus ''Streptomyces''.

WordNet Word definitions in WordNet
n. any of various red antibiotics isolated from soil bacteria

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
actinomycin \actinomycin\ n. [From actinomyces, the genus of the organism in which they were first found.] 1. any of various red antibiotics isolated from soil bacteria with a three-ring heterocyclic nucleus with an attached peptide chain. Note: Actinomycin ...