xanthophyll noun. ['zanƟǝ(ʊ)fɪl] M19.
[from XANTHO- + Greek phullon leaf.]
Biochemistry. Any of a group of yellow or brown oxygen-containing carotenoids which act as accessory pigments in photosynthesis; spec. lutein. Also xanthophyll-pigment.

■ xantho'phyllic adjective of or containing xanthophyll M20.

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