Tannin
CLASS OF ASTRINGENT, BITTER PLANT POLYPHENOLIC CHEMICAL COMPOUNDS
Tannins; Tannic; Pigmented tannins; Pigmented tannin; Pseudo Tannins; Pseudo tannins; Pseudotannin; Vegetable tannins; Vegetable tannin; Organic tannins; Organic tannin; Tannin source; Hamamelitannin; Hamamelitannins; Tannoid; Tannoids; Natural Organic Tannins; Natural Organic Tannin; Natural organic tannin; Natural organic tannins; Löwenthal-Procter method; Löwenthal's method; Neubauer-Löwenthal method; Deijs method; Deijs' method; Deijs; Formalin-hydrochloric acid method; Feldmann method; Feldmann's method; Hide-powder method; Hide-powder; Hide powder; Stiasny method; Stiasny's method; Löwenthal method; Tanniferous; Goldbeater's skin test
Tannins (or tannoids) are a class of astringent, polyphenolic biomolecules that bind to and precipitate proteins and various other organic compounds including amino acids and alkaloids.