(chemistry) Any of three possible metameric substances that are dimethyl derivatives of thiophene, like the xylenes from benzene.
thyroxin
thyroxin
noun
Alternative spelling of thyroxine
xanthein
xanthein
noun
(chemistry) The water-soluble part of the yellow carotenoid pigment present in the cell sap of some plants.
xanthian
xanthian
Adjective
Of the city Xanthos (or Xanthus) in ancient Lycia.
Noun
A citizen of Xanthos.
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.
xanthins
xanthins
noun
plural of xanthin
xanthism
xanthism
noun
(biology, zoology) A yellowish colouring of pigments in hair, skin, feathers, etc.
xanthite
xanthite
noun
A variety of vesuvianite found in limestone near Amity, New York.
xanthium
xenolith
xenolith
noun
(geology) any piece of rock having a different origin to that of the igneous rock in which it is found
