1. proteins produced by the immune system that identify and neutralize foreign substances like bacteria, viruses, or toxins
Usage: biology; medicine

Examples

• The vaccine helps your body produce antibodies against the virus.
• Blood tests can detect antibodies to determine if someone has been infected.
• Her immune system created antibodies to fight off the bacterial infection.
• Antibodies bind to specific antigens on the surface of pathogens.
• The doctor explained how antibodies provide immunity against diseases.
• Researchers are studying how long antibodies remain in the bloodstream.
• Some people have naturally occurring antibodies that protect them from certain illnesses.