/ Dictionary / Index L lumbosacral: Meaning and Definition of Find definitions for: lum•bo•sa•cral Pronunciation: (lum"bō-sā'krul), [key] — adj. Anat. of, pertaining to, or involving the lumbar and sacral regions or parts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lumbosacral (Thesaurus) lumbo- lumbrical Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language