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Definitions for Tannin

[1] Chemistry . any 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] any of these compounds occurring in wine and imparting an astringent taste, especially in red wine.
[3] 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 C 76 H 52 O 46 Also called: tannic acid

Words nearby Tannin

tannhäuser, tannic, tannic acid, tannie, tanniferous, tannin, tanning, tanning bed, tannish, tannoy, tannu tuva people's republic

Origin of Tannin

1795–1805; earlier tanin < F. See tan1, -in2

Other words from Tannin

non·tan·nin , noun

Word origin for Tannin

C19: from French tanin, from tan 1