Definition of warfarin
: a crystalline anticoagulant coumarin derivative C19H16O4 that inhibits the production of prothrombin by vitamin K and is used as a rodent poison and in medicine; also : its sodium salt C19H15NaO4 used especially in the prevention or treatment of thromboembolic disease
Recent Examples of warfarin from the Web
Kaput comes in pellets that are infused with warfarin, an anticoagulant used to minimize the chances of blood clots in humans that can cause heart attacks or strokes.
According to one manufacturer’s website, 92 percent of patients with the device were able to stop using warfarin, a prescription blood thinner, within 45 days of implantation.
Hog poison: HB 3451 prevents the use of lethal pesticides, such as warfarin, to control the feral hog population until a study showing the impact on the environment, hunters and agriculture can be conducted.
Price explains that the product is baited food laced with warfarin, a blood thinner used for humans that is lethal to hogs.
That apparently referred to erroneous results in a test of blood clotting used for patients who take the blood thinner warfarin.
Deciding on an appropriate warfarin dose has never been easy: some people are more sensitive than others.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'warfarin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of warfarin
Wisconsin Alumni Research Foundation (its patentee) + coumarin
First Known Use: 1950See Words from the same year
Medical Definition of warfarin
: a crystalline anticoagulant coumarin derivative C19H16O4 related to dicumarol that inhibits the production of prothrombin by vitamin K and is used as a rodent poison and in medicine; also : its sodium salt C19H15NaO4 used especially in the prevention or treatment of thromboembolic disease—see coumadin
Learn More about warfarin
Britannica.com: Encyclopedia article about warfarin
Seen and Heard
What made you want to look up warfarin? Please tell us where you read or heard it (including the quote, if possible).