Warfarin

n. crystalline substance used to kill rodents

Warfarin (also known under the brand names of Coumadin, Jantoven, Marevan, and Waran) is an anticoagulant medication that is administered orally or, very rarely, by injection. It is used for the prophylaxis of thrombosis and embolism in many disorders. Its activity has to be monitored by frequent blood testing for the international normalized ratio (INR). It is named for the Wisconsin Alumni Research Foundation.
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Noun
1. an anticoagulant (trade name Coumadin) use to prevent and treat a thrombus or embolus
(synonym) Coumadin
(hypernym) anticoagulant, anticoagulant medication, decoagulant
(classification) trade name, brand name, brand, marque

n. warfarin, chemical substance used to kill rodents

A drug that prevents blood from clotting. It belongs to the family of drugs called anticoagulants (blood thinners).