catechin

[ kat-i-chin, -kin ]

/ ˈkæt ɪ tʃɪn, -kɪn /

a water-soluble, astringent yellow compound, C15H14O6, found in gambier, used chiefly in tanning and dyeing.

Origin of catechin

First recorded in 1850–55; catech(u) + -in²

Apples contain an anti-inflammatory flavonoid called quercetin, while red wine contains the flavonoid catechin.

10 Power Food Combos |Divya Gugnani |March 18, 2010 |DAILY BEAST
It contains a crystallisable principle (margosine) and an astringent principle (catechin).

Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I |Arnold Cooley
It contains 60 % of tanning matter and a large proportion of catechin similar to that contained in gambier, but much redder.

Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 3 |Various
It contains two coloring principles, catechin and catechu-tannic acid.

Principles and Practice of Fur Dressing and Fur Dyeing |William E. Austin

Catechu tannin and catechin are compounds of the catechol tannin type.

The Chemistry of Plant Life |Roscoe Wilfred Thatcher

catechin

/ (ˈkætəkɪn) /

a soluble yellow solid substance found in catechu and mahogany wood and used in tanning and dyeing. Formula: C 15 H 14 O 6

C19: from catechu + -in