TANNIN

Pronunciation (US):

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 Dictionary entry overview: What does tannin mean? 

• TANNIN (noun)
  The noun TANNIN has 1 sense:

1. any of various complex phenolic substances of plant origin; used in tanning and in medicine

  Familiarity information: TANNIN used as a noun is very rare.

 Dictionary entry details 

• TANNIN (noun)

Sense 1

Meaning:

Any of various complex phenolic substances of plant origin; used in tanning and in medicine

Classified under:

Nouns denoting substances

Synonyms:

tannic acid; tannin

Hypernyms ("tannin" is a kind of...):

phenol (any of a class of weakly acidic organic compounds; molecule contains one or more hydroxyl groups)

Hyponyms (each of the following is a kind of "tannin"):

cutch; kutch (tannin extract derived from any of several mangrove barks of Pacific areas)

catechin (a tannic acid that is extracted from black catechu as a white crystalline substance)

Derivation:

tannic (derived from tannin)

 Context examples 

Tannins and other polyphenols may have chemopreventive activity.

(Guarana Supplement, NCI Thesaurus)

Examples of bioactive compounds include lycopene, resveratrol, lignan, tannins, and indoles.

(Bioactive compound, NCI Dictionary)

A hydrolyzable tannin with three additional hydroxyl groups attached at the 3, 4, and 5 positions of the phenyl ring.

(Gallic Acid, NCI Thesaurus/CRCH)

This agent may have anti-inflammatory and analgesic properties, possibly due to the presence of antioxidants, phenols, tannins, triterpenoids and volatile oils.

(Devil's Foot/Jambul, NCI Thesaurus)

The herb contains the alkaloids stachydrine and leonurinine, glycosides, diterpinoids, flavonoids, tannins, volatile oils, and vitamin A.

(Motherwort, NCI Thesaurus)

A class of tannins composed of phenolic acids connected to a central core sugar (typically D-glucose).

(Hydrolyzable Tannin, NCI Thesaurus/CRCH)

A hydrolyzable tannin with a propenoic acid (COOHCH=CH-), and hydroxyl groups at the 3 and 4 positions of the phenyl ring.

(Caffeic Acid, NCI Thesaurus/CRCH)

The skin extract of the muscadine grape contains numerous phytochemicals including hydrolyzable tannins and flavonoids, such as anthocyanin 3,5-diglucosides, quercetin, myricetin, and kaempferol glycosides.

(Muscadine Grape Skin Extract, NCI Thesaurus)

Guarana supplement contains various phytochemicals, including caffeine, theobromine, theophylline, tannins, saponins, catechins, epicatechins, proanthocyanidols and other compounds in minor concentrations.

(Guarana Supplement, NCI Thesaurus)