precipitin

noun
pre·cip·i·tin | \pri-ˈsi-pə-tən \

Definition of precipitin 

: an antibody that forms a precipitate when it unites with its antigen

First Known Use of precipitin

1900, in the meaning defined above

History and Etymology for precipitin

International Scientific Vocabulary, from precipitate

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The first known use of precipitin was in 1900

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precipitin

noun
pre·cip·i·tin | \pri-ˈsip-ət-ən \

Medical Definition of precipitin 

: any of various antibodies which form insoluble precipitates with specific antigens and some of which are used in serological testing

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