+Tannin is a bitter, astringent plant compound, often felt as a dry sensation on the tongue. These natural [polyphenols](/wiki/polyphenol) are key to the character of [wine](/wiki/wine) and tea, and have long been used in tanning animal hides.
+## See also
+- [Polyphenol](/wiki/polyphenol)
+- [Astringency](/wiki/astringency)
+- [Tea](/wiki/tea)
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