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lutein

[loo-tee-in] /ˈlu ti ɪn/
noun, Biochemistry.
1.
Also called xanthophyll. a yellow-red, water-insoluble, crystalline, carotenoid alcohol, C 40 H 56 O 2 , 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.
2.
a preparation consisting of dried and powdered corpora lutea from hogs.
Origin of lutein
1865-1870
1865-70; < Latin lūte(um) yolk of an egg (noun use of neuter of lūteus yellow; see luteous) + -in2
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for lutein

lutein

/ˈluːtɪɪn/
noun
1.
a xanthophyll pigment, occurring in plants, that has a light-absorbing function in photosynthesis
Word Origin
C20: from Latin lūteus yellow + -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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lutein in Medicine

lutein lu·te·in (lōō'tē-ĭn, -tēn')
n.

  1. A yellow carotenoid pigment found widely in nature; xanthophyll.

  2. A dried preparation of corpus luteum.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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