Tannins: nm pl. Tannins (or tannins) are originally the powder extracted from the bark of the oak (tan means oak in Gallic) used to tan the skins. This term now designates a substance of organic origin which is found in most plants. We speak indifferently of vegetable tannin, polyphenols or phenolic compounds. So, in wine, the tannins * come (mainly for red wines) from the skin, the pips (5 to 8%) and the stems of the grapes ...
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