xanthophane

from The Collaborative International Dictionary of English v.0.48

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}.
   [1913 Webster]