Main Entry: an·ti·pro·throm·bin Pronunciation: -(")prO-'thräm-b&n Function: noun : a substance that interferes with theconversion of prothrombin to thrombin —compare ANTITHROMBIN, HEPARIN
antiprothrombin an·ti·pro·throm·bin (ān'tē-prō-thrŏm'bĭn, ān'tī-) n. An anticoagulant that inhibits or prevents the conversion of prothrombin into thrombin.