noun Immunology.

an antibody that reacts with its specific antigen to form an insoluble precipitate.

Origin of precipitin

First recorded in 1895–1900; precipit(ate) + -in2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for precipitin

Historical Examples of precipitin

British Dictionary definitions for precipitin



immunol an antibody that causes precipitation when mixed with its specific antigen
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

precipitin in Medicine




An antibody that under suitable conditions combines with and causes a specific soluble antigen to precipitate.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.