1. A serum containing antibodies against a specific antigen, used to provide immunity or treat disease.
Usage: Medical/scientific term; Usually used in singular or plural form 'antisera'

Examples

• The doctor administered antiserum to the patient bitten by a venomous snake.
• Antiserum against tetanus is given to prevent the disease after an injury.
• Researchers developed a new antiserum to combat the viral infection.
• The laboratory produced antiserum by injecting animals with the target antigen.
• Antiserum therapy has been used for decades to treat certain bacterial infections.
• The hospital kept supplies of antiserum on hand for emergency use.