xanthophyll

from WordNet (r) 3.0 (2006)

xanthophyll
    n 1: yellow carotenoid pigments in plants and animal fats and
         egg yolks [syn: {xanthophyll}, {xanthophyl}, {lutein}]

from The Collaborative International Dictionary of English v.0.48

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}.
   [1913 Webster]