tannin
/ˈtænɪn/
noun
- A natural substance found in plants, especially in bark, leaves, and unripe fruit, that gives a bitter taste and can bind to proteins, used in tanning leather and in some foods and drinks.
- Tannins in red wine can make your mouth feel dry.
- Unripe persimmons contain high levels of tannin, which makes them taste bitter.
- The bark of the oak tree is rich in tannins used for leather production.
Synonyms