idioheteroagglutinin

An idioagglutinin occurring in the blood of one animal, but capable of combining with the antigenic material from another species. [idio- + G. heteros, another, + agglutinin]

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id·io·het·ero·ag·glu·ti·nin (id″e-o-het″ər-o-ə-glooґtĭ-nin) [idio- + heteroagglutinin] a heteroagglutinin normally present in the blood.