coumarinn.

/ˈkuːmərɪn/

Etymology: < French coumarine, < coumarou = cumarú , the name in French Guiana of the Tonka bean + -in suffix¹.

Chemistry.

A crystalline substance (C₉H₆O₂), with aromatic odour, found in the seeds of the cumarú, coumarou, or Tonka bean; also in melilot, woodruff, sweet-scented vernal grass, etc.

ΚΠ

1830 J. Lindley Introd. Nat. Syst. Bot. 92 The volatile oil of the Coumarouma odorata, or Tonka Bean, has been ascertained to be a peculiar principle called Coumarin.

1882 J. Smith Dict. Econ. Plants 136 It is probable that hay-fever..may be attributed to the coumarin in the atmosphere.

Derivatives

ˈcoumaric adj. in coumaric acid, an acid (C₉H₈O₃) obtained from coumarin.

ΚΠ

1864 H. Watts Dict. Chem. II. 93 Coumaric acid decomposes carbonates.

ˈcoumarate n. a salt of coumaric acid.

ΚΠ

1864 H. Watts Dict. Chem. II. 93 The formula of the coumarates is C⁹H⁷O².M.

This entry has not yet been fully updated (first published 1893; most recently modified version published online June 2018).

单词	coumarin
释义	coumarinn. /ˈkuːmərɪn/ Etymology: < French coumarine, < coumarou = cumarú , the name in French Guiana of the Tonka bean + -in suffix¹. Chemistry. A crystalline substance (C₉H₆O₂), with aromatic odour, found in the seeds of the cumarú, coumarou, or Tonka bean; also in melilot, woodruff, sweet-scented vernal grass, etc. ΚΠ 1830 J. Lindley Introd. Nat. Syst. Bot. 92 The volatile oil of the Coumarouma odorata, or Tonka Bean, has been ascertained to be a peculiar principle called Coumarin. 1882 J. Smith Dict. Econ. Plants 136 It is probable that hay-fever..may be attributed to the coumarin in the atmosphere. Derivatives ˈcoumaric adj. in coumaric acid, an acid (C₉H₈O₃) obtained from coumarin. ΚΠ 1864 H. Watts Dict. Chem. II. 93 Coumaric acid decomposes carbonates. ˈcoumarate n. a salt of coumaric acid. ΚΠ 1864 H. Watts Dict. Chem. II. 93 The formula of the coumarates is C⁹H⁷O².M. This entry has not yet been fully updated (first published 1893; most recently modified version published online June 2018). < n.1830
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