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Any of several yellow carotenoid pigments, including lutein and zeaxanthin, produced by plants and green algae and visible in the leaves of deciduous trees in the autumn. Xanthophylls are also present in some animal tissues such as egg yolks.
xan′tho·phyl′lic, xan′tho·phyl′lous adj.
(Elements & Compounds) any of a group of yellow carotenoid pigments occurring in plant and animal tissue
or xan•tho•phyl(ˈzæn θə fɪl)
a carotenoid yellow pigment of plants, algae, and other forms, often masked by the green of chlorophyll.