n.
pl.an·ti·bod·ies
A Y-shaped protein on the surface of B cells that is secreted into the blood or lymph in response to an antigenic stimulus, such as a bacterium, virus, parasite, or transplanted organ, and that neutralizes the antigen by binding specifically to it; an immunoglobulin.
[Translation of German Antikörper : anti-, antagonistic (from Latin anti-, anti-) + Körper, body.]
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