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

International Scientific Vocabulary, from precipitate

First Known Use: 1900

Medical Dictionary

noun pre·cip·i·tin \pri-ˈsip-ət-ən\

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

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