ˈwȯ(r)fərə̇n noun
( -s )
Etymology: W isconsin A lumni R esearch F oundation (its patentee) + coum arin
: a crystalline compound C 19 H 16 O 4 that is made by condensation of hydroxy-coumarin and benzylidene-acetone, that exerts a biological effect like that of dicoumarol, and that is used as a rodenticide and in medicine as an anticoagulant