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单词 tannin
释义

WordReference Random House Learner's Dictionary of American English © 2024
tan•nin /ˈtænɪn/USA pronunciation   n. [uncountable]
  1. Chemistrya chemical used in tanning, found also in tea.
Also called ˈtan•nic ˈac•id. 
WordReference Random House Unabridged Dictionary of American English © 2024
tan•nin  (tan′in),USA pronunciation n. 
  1. Chemistryany of a group of astringent vegetable principles or compounds, chiefly complex glucosides of catechol and pyrogallol, as the reddish compound that gives the tanning properties to oak bark or the whitish compound that occurs in large quantities in nutgalls (common tannin, tannic acid). 
  2. Wineany of these compounds occurring in wine and imparting an astringent taste, esp. in red wine.
  • French. See tan1, -in2
  • earlier tanin 1795–1805

Collins Concise English Dictionary © HarperCollins Publishers::
tannin /ˈtænɪn/ n
  1. any of a class of yellowish or brownish solid compounds found in many plants and used as tanning agents, mordants, medical astringents, etc. Tannins are derivatives of gallic acid with the approximate formula C76H52O46
    Also called: tannic acid
Etymology: 19th Century: from French tanin, from tan1
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更新时间：2025/2/23 14:24:49