Pronunciation: (lu-tis'u-mus dôr'sī), [key]
—pl. la•tis•si•mi dor•siPronunciation: (lu-tis'u-mī" dôr'sī). [key] Anat.
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.