noun Pharmacology.
  1. a cytotoxic polypeptide, C62H86N12O16, isolated from the bacterium Streptomyces parvullus, used in the treatment of certain cancers.

Origin of dactinomycin

reversal of actinomycin D; see actinomycin
Also called actinomycin D.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

dactinomycin in Medicine


  1. An antibiotic isolated from bacteria and used as an antineoplastic agent in the treatment of certain cancers.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.