Source : Webster's Revised Unabridged Dictionary (1913)

Xanthophyll \Xan"tho*phyll\, n. [Xantho- + Gr. fy`llon leaf.]
   (Bot.)
   A yellow coloring matter found in yellow autumn leaves, and
   also produced artificially from chlorophyll; -- formerly
   called also {phylloxanthin}.

Source : WordNet®

xanthophyll
     n : yellow carotenoid pigments in plants and animal fats and egg
         yolks [syn: {xanthophyl}, {lutein}]