Definition of precipitin in English:

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Pronunciation: /prēˈsipədən/


An antibody that produces a visible precipitate when it reacts with its antigen.
Example sentences
  • Serum agglutinins, precipitins, and complement-fixing antibodies can also be used to establish a diagnosis.
  • His laboratory was the first to emphasize the importance of precipitins to various peptide and polysaccharide antigens of Aspergillus fimigatus.
  • A negative serologic assay for precipitins does not rule out disease, as many factors can decrease the sensitivity of the test.


Early 20th century: from the verb precipitate + -in1.

For editors and proofreaders

Syllabification: pre·cip·i·tin

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