coproantibody

cop·ro·an·ti·body .käp-rō-'ant-i-.bäd-ē n, pl -bod·ies an antibody whose presence in the intestinal tract can be demonstrated by examination of an extract of the feces

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cop·ro·an·ti·body (kop″ro-anґtĭ-bod″e) an antibody found in the feces, chiefly secretory IgA.