The Collaborative International Dictionary of English v.0.48:
Xanthous \Xan"thous\, a. [Gr. xanqo`s yellow.] Yellow; specifically (Ethnol.), of or pertaining to those races of man which have yellowish, red, auburn, or brown hair. [1913 Webster]WordNet (r) 3.0 (2006):
xanthous adj 1: of the color intermediate between green and orange in the color spectrum; of something resembling the color of an egg yolk [syn: yellow, yellowish, xanthous]