any of several toxic antibiotics obtained from bacteria of the genus Streptomyces, used in treating some cancers; the most commonly used is dactinomycin (actinomycin D)
WordReference Random House Unabridged Dictionary of American English © 2025
ac•tin•o•my•cin
(ak tin′ō mī′sin, ak′tə nō-),USA pronunciation n. [Pharm.]
- Drugsany of a group of related antibiotics derived from several species of streptomyces bacteria, used against susceptible bacteria and fungi and in the treatment of various cancers.
- actinomyc(es) + -in2
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'actinomycin' also found in these entries (note: many are not synonyms or translations):