<p><strong>Noun:</strong></p><ul><li>Also called xanthophyll</li><li>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.</li><li>A preparation consisting of dried and powdered corpora lutea from hogs.</li></ul>