A pale yellow crystalline glycoside obtained from quercitron bark, which yields quercetin and rhamnose on hydrolysis and is used as a dye.

Any of a class of yellow or white flavonoid pigments found in plants.

That part of the yellow colouring-matter of flowers which is soluble in water: cf. xanthin, n. 1b.

That part of the yellow colouring-matter of flowers which is insoluble in water: cf. xanthein, n.

A yellow-brown colouring matter present in various algae, esp. in diatoms and brown algae.

Xanthophyll; chlorophyll. rare and disused.

A deep yellow carotenoid pigment present in the retina of the eye and in some plants and microorganisms, used as a food additive and supplement.

A xanthophyll pigment widely distributed in plant chloroplasts, where it is involved in biochemical responses to excessive light levels, and…

Any of a group of yellow pigments (as lutein and violaxanthin) that are oxygenated carotenoids.