streptolysin

noun
strep·​to·​ly·​sin | \ˌstrep-tə-ˈlī-sᵊn \

Definition of streptolysin 

: an antigenic hemolysin produced by streptococci

First Known Use of streptolysin

1904, in the meaning defined above

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The first known use of streptolysin was in 1904

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streptolysin

noun
strep·​to·​ly·​sin | \ˌstrep-tə-ˈlīs-ᵊn \

Medical Definition of streptolysin 

: any of various antigenic hemolysins produced by streptococci

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