| precipitinogen | 1. An antigen that stimulates the formation of specific precipitin when injected into an animal body. 2. A precipitable soluble antigen. Synonym: precipitogen. Origin: precipitin + G. -gen, producing (05 Mar 2000) |
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| precipitinogenoid | A precipitinogen that is altered by means of heating, thereby resulting in a substance that combines with the specific precipitin, but does not lead to the formation of a precipitate. (05 Mar 2000) |