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[wawr-fuh-rin] /ˈwɔr fə rɪn/
noun, Chemistry
a colorless, crystalline, water-insoluble anticoagulant, C 19 H 16 O 4 , used chiefly as a rodenticide.
Pharmacology. a preparation of this used in the management of potential or existing clotting disorders.
Origin of warfarin
1945-50; W(isconsin) A(lumni) R(esearch) F(oundation) (owners of patent) + (coum)arin Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for warfarin
  • When you are taking warfarin, you are more likely to bleed, even from activities you have always done.
  • When you first start taking warfarin, you will need frequent blood tests.
  • In rare cases, using warfarin to thin the blood and prevent clots can cause brief increased clotting and severe skin wounds.
  • She recovered, and is on maintenance therapy with warfarin, a blood thinner.
  • It also may interact with certain medications, including the blood thinner warfarin.
  • Since it is flavorless, warfarin is a plausible weapon of murder.
British Dictionary definitions for warfarin


a crystalline insoluble optically active compound, used as a rodenticide and, in the form of its sodium salt, as a medical anticoagulant. Formula: C19H16O4
Word Origin
C20: from the patent owners W(isconsin) A(lumni) R(esearch) F(oundation) + (coum)arin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for warfarin



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."

Online Etymology Dictionary, © 2010 Douglas Harper
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warfarin in Science
A white crystalline compound used as a rodenticide and as an anticoagulant in medicine. Warfarin is a derivative of coumarin. Chemical formula: C19H16O4.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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