1. An antigen that stimulates the production of precipitins (antibodies that form visible precipitates when they bind to their corresponding antigens).
Usage: technical; immunology

Examples

• The precipitinogen in the serum sample reacted with the specific antibodies to form a visible precipitate.
• Researchers identified the precipitinogen responsible for the immune response in the patient's blood.
• The precipitinogen-precipitin reaction is used in forensic serology to identify biological samples.
• Different precipitinogens trigger distinct antibody responses in immunological testing.
• The laboratory tested whether the unknown substance was a precipitinogen by mixing it with known precipitins.