luteinizing hormone: a hormone produced by the anterior lobe of the pituitary gland that, in the female, stimulates maturation of the ovarian follicle and formation of the corpus luteum: chemically identical to ICSH of the male.
1. left hand.
2. lower half. Also,L.H.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.