actinomycetin
noun
ac·ti·no·my·ce·tin
| \ -ˌmī-ˈsēt-ᵊn
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Medical Definition of actinomycetin
: a bacteriolytic fluid substance that is obtained from a soil bacterium of the genus Streptomyces (S. albus) and that lyses various bacteria (as living streptococci or heat-killed colon bacilli)