单词	precipitin
释义	precipitin /prɪˈsɪpɪtɪn / noun Biochemistry An antibody that produces a visible precipitate when it reacts with its antigen: [as modifier]: a precipitin test... 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. Origin Early 20th century: from the verb precipitate + -in1.
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