Black's Law Dictionary (2nd edition)dictionaries

Precipitin Test

Precipltins are formations in the blood of an animal induced by repeated injectlons Into its veins of the blood-serum of an animal of another species; and their importance in diagnosis lies in the fact that when the blood-serum .of an animal so treated is mixed with that of any animal of the second species (or a closely related species) and the mixture kept

Source: Black's Law Dictionary 2nd Ed (1910)