Warfarin (n.)

1950, from WARF, acronym from Wisconsin Alumni Research Foundation + -arin, from Coumarin. The organization describes itself as "an independent, nonprofit foundation chartered to support research at the U[niversity of] W[isconsin]-Madison and the designated technology transfer organization for the university."

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Definitions of Warfarin from WordNet

warfarin (n.)
an anticoagulant (trade name Coumadin) use to prevent and treat a thrombus or embolus;
Synonyms: Coumadin