/ Dictionary / Index L latissimus dorsi: Meaning and Definition of Find definitions for: la•tis•si•mus dor•si Pronunciation: (lu-tis'u-mus dôr'sī), [key] — pl. la•tis•si•mi dor•si a broad, flat muscle on each side of the midback, the action of which draws the arm backward and downward and rotates the front of the arm toward the body. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. latish Latitia 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