
1) Carotenoid 2) Dietary antioxidant 3) Xanthophyl 4) Xanthophyll
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https://www.crosswordclues.com/clue/lutein

1) Xanthophyl 2) Xanthophyll
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https://www.crosswordclues.com/clue/lutein

Lutein (n or n; from Latin luteus meaning `yellow`) is a xanthophyll and one of 600 known naturally occurring carotenoids. Lutein is synthesized only by plants and like other xanthophylls is found in high quantities in green leafy vegetables such as spinach, kale and yellow carrots. In green plants, xanthophylls act to modulate light energy and .....
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http://en.wikipedia.org/wiki/Lutein

• (n.) A substance of a strongly marked yellow color, extracted from the yelk of eggs, and from the tissue of the corpus luteum.
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http://thinkexist.com/dictionary/meaning/lutein/

(loo´te-in) a lipochrome from the corpus luteum, fat cells, and egg yolk. any lipochrome.
Found on
http://www.encyclo.co.uk/local/21001
Lu'te·in noun [ From corpus
lute um.]
(Physiol. Chem.) A substance of a strongly marked yellow color, extracted from the yelk of eggs, and from the tissue of the corpus luteum.
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http://www.encyclo.co.uk/webster/L/71

Type: Term Pronunciation: lū′tē-in Definitions: 1. The yellow pigment in the corpus luteum, in the yolk of eggs, or any lipochrome. 2. The dried powdered corpora lutea of the hog, formerly used as a progesterone source. Synonyms: xanthophyll
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http://www.medilexicon.com/medicaldictionary.php?t=51551

Also calleda yellow-red, water-insoluble, crystalline, carotenoid alcohol, CHO, found in the petals of marigold and certain other flowers, egg yolk, algae, and corpora lutea: used chiefly in the biochemical study of the carotenoids. · a preparation consisting of dried and powdered corpora lutea from hogs.
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https://www.infoplease.com/dictionary/lutein
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