A type of protein produced by immune system cells that functions as an antibody to fight infections and foreign substances. These Y-shaped molecules recognize and bind to specific antigens to neutralize threats.
Compound from Latin 'immunis' meaning 'exempt, free from' and 'globulin' from 'globulus' meaning 'small sphere,' referring to the spherical protein structure. The term was coined in the mid-20th century as immunology advanced.
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