actinomycin

noun
ac·​ti·​no·​my·​cin | \-ˈmī-sᵊn \

Definition of actinomycin 

: any of various red or yellow-red mostly toxic polypeptide antibiotics isolated from soil bacteria (especially Streptomyces antibioticus) specifically : one used to inhibit DNA or RNA synthesis

First Known Use of actinomycin

1940, in the meaning defined above

History and Etymology for actinomycin

New Latin Actinomyces actinomyces + -in entry 1

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The first known use of actinomycin was in 1940

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actinomycin

noun
ac·​ti·​no·​my·​cin | \-ˈmīs-ᵊn \

Medical Definition of actinomycin 

: any of various red or yellow-red mostly toxic polypeptide antibiotics isolated from soil bacteria (especially Streptomyces antibioticus) specifically : one used to inhibit DNA or RNA synthesis

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