/ Dictionary / Index L luteal: Meaning and Definition of Find definitions for: lu•te•al Pronunciation: (l'tē-ul), [key] — adj. of, pertaining to, or involving the corpus luteum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: luteal (Thesaurus) lute luteal phase Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language