precipitin

noun

pre·cip·i·tin pri-ˈsi-pə-tən

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

Word History

Etymology

International Scientific Vocabulary, from precipitate

First Known Use

1900, in the meaning defined above

Time Traveler

The first known use of precipitin was in 1900

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Cite this Entry

Style

“Precipitin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/precipitin. Accessed 4 Nov. 2025.

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Medical Definition

precipitin

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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