Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. An antibody that reacts with a specific soluble antigen to produce a precipitate.
Century Dictionary and Cyclopedia
- n. An adaptation-product which is formed in the blood-serum of an animal of one species when immunized with albumins or albuminous derivatives obtained from an animal of an alien species. When the sera of the two animals are brought together a precipitate results, in the formation of which the immunizing substance plays the active and the immune substance the passive rôle.
Wiktionary
- n. any antibody which reacts with an antigen to form a precipitate
WordNet 3.0
- n. an antibody that causes precipitation when it unites with its antigen
Etymologies
- precipit(ate) + -in. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“Two minutes later, McReady held a test-tube with white precipitin settling slowly from straw-colored serum.”
“McReady noticed him first, sitting on the edge of the bunk, with two precipitin-whitened test-tubes of straw-colored fluid, his face whiter than the stuff in the tubes, silent tears slipping down from horror-widened eyes.”
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