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

Malbec naturally has a deep color and low tannin levels, which gives it its smooth and fleshy texture. —John Mariani, Forbes.com, 14 May 2025

The dietitian said grape skins also contain tannins, which have antioxidant properties and help give red wine a distinct flavor, but they may also be linked to headaches. —Amy McGorry, FOXNews.com, 9 May 2025

Cru Bourgeois has aromas of black olive tapenade, black currant, and red plum with fine tannins and juicy flavors of cassis, plum, and finely ground black pepper. —Mike Desimone, Robb Report, 8 May 2025

The medium-weight tannins display the lovely suppleness and elegance of the Stags Leap District. —Tom Hyland, Forbes, 18 Mar. 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