In particular, a billion is 10 9 = 1 000 000 000 in the American system and 10 12 = 1 000 000 000 000 in the European system. For 10 9, Europeans say thousand million or milliard.. Although we describe the two systems today as American or European, both systems are actually of French origin.
Definition of warfarin. : a crystalline anticoagulant coumarin derivative C19H16O4 that inhibits the production of prothrombin by vitamin K and is used as a rodent poison and in medicine; also : its sodium salt C19H15NaO4 used especially in the prevention or treatment of thromboembolic disease.
The oral anticoagulant warfarin (also called coumadin) is a vitamin K antagonist that is widely used to prevent venous thrombosis. Warfarin inhibits the post-translational carboxylation of coagulation factors II, VII, IX and X. This diminishes the ability of these factors to interact with phospholipid membranes.