tannin
[ tan-in ]
/ ˈtæn ɪn /
noun
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.
OTHER WORDS FROM tannin
non·tan·nin, nounWords nearby tannin
tannhäuser,
tannic,
tannic acid,
tannie,
tanniferous,
tannin,
tanning,
tanning bed,
tannish,
tannoy,
tannu tuva people's republic
Example sentences from the Web for tannin
British Dictionary definitions for tannin
tannin
/ (ˈtænɪn) /
noun
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
Word Origin for tannin
C19: from French
tanin, from
tan
1
Scientific definitions for tannin
tannin
[ tăn′ĭn ]
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 bind proteins and are used in dyeing, in tanning leather, in clarifying wine and beer, and as an astringent in medicine. Tannins also give color and flavor to black tea.
Any of various other substances that promote the tanning of leather, such as chromium salts.