tannin

noun

tan·​nin ˈta-nən 

1

: any of various soluble astringent complex phenolic substances of plant origin used especially in tanning leather and dyeing textiles, manufacturing ink, clarifying wine and beer, and in medicine

2

: a substance that has a tanning effect

Examples of tannin in a Sentence

Recent Examples on the Web

Offering a purple color and sometimes intoxicating aromas of morel cherry and black chocolate, backed by good to very good acidity and often robust tannins (depending on the vintage), Taurasi is a powerful red that ages extremely well. —Tom Hyland, Forbes, 19 Feb. 2025

The end result was a blend of Cabernet Sauvignon, offering a bit of muscular tannins; Cabernet Franc, adding aromatics and finesse; and, finally, a touch of Petit Verdot. —Nicole Hoey, Robb Report, 16 Feb. 2025

If iron absorption is a top priority, many healthcare professionals will encourage you to watch your intake of tannins—these plant compounds bind strongly to the mineral. —Christina Manian, Health, 15 Feb. 2025

On the palate, the wine exhibits exceptional intensity, texture, purity and a dull-bodied finish with velvety but noticeable tannins. —Tommy Tuberville, Newsweek, 8 Jan. 2025

Word History

Etymology

French, from tanner to tan

First Known Use

1802, in the meaning defined at sense 1

Rhymes for tannin

• canon
• fanon
• mannan
• olecranon
• trianon

Kids Definition

tannin

noun

tan·​nin ˈtan-ən 

: any of various substances from plants (as the oak or sumac) used in tanning leather, dyeing fabric and yarn, the making of ink, and in medicine

Medical Definition

tannin

noun

tan·​nin ˈtan-ən 

1

: any of various soluble astringent complex phenolic substances of plant origin used in tanning, dyeing, the making of ink, and in medicine as astringents and formerly in the treatment of burns

2

: a substance that has a tanning effect