/dak'teuh noh muy"sin/ , n. Pharm.
a cytotoxic polypeptide, C 62 H 86 N 12 O 16 , isolated from the bacterium Streptomyces parvullus, used in the treatment of certain cancers. Also called actinomycin D .
[ reversal of actinomycin D; see ACTINOMYCIN ]