The yellow colouring matter of saffron, which undergoes various changes of colour when acted on by different reagents. Cf. safranine, n. a.

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.

The yellow colouring-matter of leaves in autumn, a constituent or derivative of chlorophyll; also called phylloxanthin. (Now recognized as an…

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.

= xanthophyll, n. a.

†(a) The yellow colouring matter of saffron. Now Obsolete. (b) A coal-tar colour which dyes yellowish-red. Also, any of a large class of azine…

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

a yellow pigment occurring in the shells of birds' eggs.

Xanthophyll; chlorophyll. rare and disused.