(chemistry) Any of three possible metameric substances that are dimethyl derivatives of thiophene, like the xylenes from benzene.
xanthein
xanthein
noun
(chemistry) The water-soluble part of the yellow carotenoid pigment present in the cell sap of some plants.
xanthide
xanthide
noun
(dated, organic chemistry) Any derivative of xanthogen
xanthine
xanthine
noun
(chemistry) Any of a group of alkaloids that include caffeine, theophylline, and theobromine as well as the parent compound, a precursor of uric acid found in many organs of the body.
xanthite
xanthite
noun
A variety of vesuvianite found in limestone near Amity, New York.
xenolith
xenolith
noun
(geology) any piece of rock having a different origin to that of the igneous rock in which it is found
