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[koo-muh-din] /ˈku mə dɪn/
Pharmacology, Trademark.
a brand name for warfarin (def 2). Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Word Origin and History for Coumadin

by 1953, name for human anti-coagulant use of the rat poison warfarin sodium, abstracted from the chemical name, 3-(α-acetonylbenzyl)-4-hydroxycoumarin; earlier known as Dicoumarol, it attained publicity when it was used in 1955 to treat U.S. President Dwight Eisenhower after a heart attack. The coumarin element (1830) is from French coumarine, from coumarou, the native name in Guyana of the tonquin bean, one source of the substance.

Online Etymology Dictionary, © 2010 Douglas Harper
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