An antibody that reacts with heat-stable antigens and causes them to precipitate or form visible clumps in laboratory tests.
From 'cocto-' (heat) + 'precipitin' (an antibody that causes precipitation). A specialized immunology term combining heating and precipitation concepts.
Coctoprecipitins were crucial before modern DNA testing—forensic scientists could use boiled evidence to prove what species a blood sample came from, long before CSI made it cool.
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