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.
A: Coumadin (warfarin) is in a drug class called anticoagulants. Coumadin is also referred to as a blood thinner. Coumadin is used to prevent the formation of blood clots, or to prevent blood clots from becoming larger in the blood and blood vessels. Coumadin is used in some people who have an irregular heartbeat, prosthetic (replacement or mechanical) heart valves, and people who have had a heart attack.