- xanthurenic acid,
Origin of xanthous
1829, from Greek xanthos "yellow," of unknown origin. Prefix form xantho- is used in many scientific words; cf. xanthein (1857) "soluble yellow coloring matter in flowers," Huxley's Xanthochroi (1867) "blond, light-skinned races of Europe" (with okhros "pale"), xanthophyll (1838) "yellow coloring matter in autumn leaves."