warfarin
(wor'fă-rĭn 
)
[Abbrev. of Wisconsin Alumni Research Foundation]
C19H16O4, a synthetic coumarin anticoagulant, originally developed as a rodenticide. It is popularly but inaccurately called a blood thinner.
SEE: superwarfarin.
w. potassium C19H15KO4, the potassium salt of warfarin, used as an anticoagulant.
w. sodium C19H15NaO4, the sodium salt of potassium, used to treat or prevent thrombi and embolisms. Coumadin is one of its trade names.