noun Biochemistry.
  1. Also called xanthophyll. a yellow-red, water-insoluble, crystalline, carotenoid alcohol, C40H56O2, 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

1865–70; < Latin lūte(um) yolk of an egg (noun use of neuter of lūteus yellow; see luteous) + -in2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for lutein


  1. a xanthophyll pigment, occurring in plants, that has a light-absorbing function in photosynthesis

Word Origin for lutein

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

lutein in Medicine


[lōōtē-ĭn, -tēn′]
  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.