noun.
A crystalline flavonoid substance, C15H14O6, derived from catechu and used in tanning and dyeing.
The Century Dictionary and Cyclopedia
noun.
A principle (C19H18O8) extracted from catechu, having a snow-white silky appearance, and crystallizing in fine needles. Also called catechuic acid and catechuin.
the GNU version of the Collaborative International Dictionary of English
noun.
One of the tannic acids (C15H14O6), extracted from catechu as a white, crystalline substance; -- called also catechuic acid, catechinic acid, cyanidol, and catechuin. It is a flavonoid found generally in higher woody plants, and is used in dyeing and tanning.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a tannic acid that is extracted from black catechu as a white crystalline substance
Word Usage
"Green tea contains an especially high amount of antioxidants -- in particular, a type of polyphenol called a catechin, the most active and abundant of which is epigallocatechin-3-gallate EGCG."