/ Dictionary / Index L lumbrical: Meaning and Definition of Find definitions for: lum•bri•cal Pronunciation: (lum'bri-kul), [key] — n. Anat. any of four wormlike muscles in the palm of the hand and in the sole of the foot. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lumbosacral lumbricalis 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