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Definition of warfarin noun from the Oxford Advanced American Dictionary

 

warfarin

 noun
noun
NAmE//ˈwɔrfərən//
 
[uncountable]
 
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a substance that is used as a poison to kill rats and also for people as a medicine to make the blood thinner, for example in the treatment of thrombosis
See the Oxford Advanced Learner's Dictionary entry: warfarin