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[tan-in] /ˈtæn ɪn/
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)
any of these compounds occurring in wine and imparting an astringent taste, especially in red wine.
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
vegetable substance capable of converting animal hide to leather, 1802, from French tannin (1798), from tan “crushed oak bark containing tannin” (see tan (v.)). Tannic acid first recorded 1836, from French acide tannique, inroduced 1834 by Pelouze.
Any of various compounds, including tannic acid, that occur naturally in the bark and fruit of various plants, especially the nutgalls, certain oaks, and sumac. Tannins are polyphenols, and form yellowish to light brown amorphous masses that can be powdery, flaky, or spongy. They are used in photography, dyeing, in tanning leather, in clarifying wine and beer, and as an astringent in medicine. Tannins are also an important ingredient in tea.
noun, British. 1. . [green-wingd] /ˈgrinˌwɪŋd/ noun 1. a small freshwater duck, Anas crecca, of Eurasia and North America, having an iridescent green speculum in the wing.
noun 1. See under 1 . [turn] /tɜrn/ noun 1. any of numerous aquatic birds of the subfamily Sterninae of the family Laridae, related to the gulls but usually having a more slender body and bill, smaller feet, a long, deeply forked tail, and a more graceful flight, especially those of the genus Sterna, as […]
noun, Music. 1. a meter or tempo of four beats per measure, with each of four quarter notes receiving a single beat. Symbol: C. noun 1. (music) a time signature indicating four crotchet beats to the bar; four-four time C
noun 1. (def 2).