lutein
definition of lutein
1. a substance found in egg yolk and colorful fruits and vegetables such as spinach, kale, collard greens, broccoli, peas, brussels sprouts, kiwi, and red seedless grapes. Lutein is a carotenoid the body cannot use to make vitamin A. It is being studied in the prevention of certain eye diseases (age-related macular degeneration and cataracts).1
luteinizing hormone
definition of luteinizing hormone
1. LH. A hormone made in the brain that is important for the release of an egg from an ovary during the menstrual cycle and in making the hormones testosterone and estrogen.1