Medical Dictionary
Main Entry:
pec·to·ra·lis Pronunciation:
"pek-t&-'rA-l&s Function:
noun Inflected Form:
plural pec·to·ra·les /-"lEz/ : either of the muscles that connect the ventral walls of the chest with the bones of the upper arm and shoulder of which inhumans there are two on each side:
a : a larger one that arises from the clavicle, the sternum, the cartilages of most or all of the ribs, and the aponeurosis of the external obliquemuscle and is inserted by a strong flat tendon into the posterior bicipital ridge of the humerus called also
pectoralis major b : a smaller one that lies beneath the larger,arises from the third, fourth, and fifth ribs, and is inserted by a flat tendon into the coracoid process of the scapula called also
pectoralis minor
[pek-tuh-ral-is, -rey-lis, -rah-] 
təˈræl