| 单词 |
caffeic |
| 释义 |
caffeic, a. Chem.|kæˈfiːɪk|
[ad. F. caféique, f. café coffee; partially assimilated to mod.L. coffea, which would properly give coffeic, coffein.]
Of or pertaining to coffee; esp. in caffeic acid (C9H8O4), a substance found in brilliant yellowish prisms or plates. So ˈcaffeidine, an uncrystallizable base (C7H12N4O), produced by the action of alkalies on caffeine. caffeone |ˈkæfiːəʊn|, the aromatic principle of coffee, a brown aromatic volatile oil, produced in the roasting of coffee berries. caffeˈtannate, a salt of caffeˈtannic acid, an astringent acid found in coffee berries, Paraguay tea, and other plants.
1853Pharmac. Jrnl. XIII. 383 Caffeic acid is precipitated. 1863Watts Dict. Chem. I. 709 Caffetannic acid colours ferric salts green. Ibid. 710 The caffetannates are but little known. 1876Harley Mat. Med. 547 Caffeic acid is an astringent acid. 1880Cope's Tobacco Plant Oct. 539 First Subdivision.—Caffeïc Aliments: Coffee, Tea, Maté, Guarana, and the rest. |
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