xanth- combining form orxantho- Etymology: New Latin, from Greek, from xanthos; perhaps akin to Old High German hasan gray — more at hare 1.: yellow < xanthoma > < xanthelasma > < xanthoderma > 2.: xanthic acid < xanthate > 3.: yellow or yellowish and ammoniacal — in names of salts of cobalt < xanthocobaltic chloride >