Definition of tannin in English:

tannin

Line breaks: tan¦nin
Pronunciation: /ˈtanɪn
 
/

noun

[mass noun]
  • A yellowish or brownish bitter-tasting organic substance present in some galls, barks, and other plant tissues, consisting of derivatives of gallic acid.
    More example sentences
    • Our perception of sweetness can be affected by a number of other factors, such as temperature, tannin and carbon dioxide, not to mention alcohol.
    • To counteract intestinal discharges probably caused by the calomel, surgeons administered tannin, sulphuric acid, or morphia.
    • If you take any grape - black, red or green - and slice it through the middle it looks much the same: the stalk is woody and full of a substance called tannin.

Origin

early 19th century: from French tanin, from tan 'tanbark' (ultimately related to tan1) + -in1.

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a small amount; a little