The Collaborative International Dictionary
Xanthophane
Xanthophane \Xan"tho*phane\, n. [Xantho- + Gr. fai`nein to show.] (Physiol.) The yellow pigment present in the inner segments of the retina in animals. See Chromophane.
Wiktionary
xanthophane
n. (context biochemistry English) The yellow form of chromophane