/ Dictionary / Index L luteotropin: Meaning and Definition of Find definitions for: lu•te•o•tro•pin Pronunciation: (l"tē-u-trō'pin), [key] — n. prolactin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: luteotropin (Thesaurus) luteotropic luteous Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language