/looh"tee in/ , n. Biochem.
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.
[ 1865-70; lute ( um ) yolk of an egg (n. use of neut. of luteus yellow; see LUTEOUS) + -IN 2 ]