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A fragrant crystalline compound, C9H6O2, present in tonka beans and produced synthetically for use as a fragrance. Coumarin has been banned as a food additive in the United States because it can be toxic in large amounts.
[French coumarine, from coumarou, tonka bean tree, from Spanish coumarú, from Portuguese cumaru, from Tupí cumarú, commaru.]
cou′ma·ric (-mər-ĭk) adj.
(Elements & Compounds) a white vanilla-scented crystalline ester, used in perfumes and flavourings and as an anticoagulant. Formula: C9H6O2
[C19: from French coumarine, from coumarou tonka-bean tree, from Spanish cumarú, from Tupi]
ˈcoumaric, ˈcumaric, coumarilic adj
cou•ma•rin(ˈku mə rɪn)
a fragrant crystalline compound, C9H6O2, used chiefly in soaps and perfumery.
[1820–30; < French coumarine=coumar(ou) tonka-bean tree (< Sp cumarú < Portuguese < Tupi cumaru) + -ine -in1]