Noun
either of two large muscles of the chest
Source: WordNetAt the time of the initial post mastectomy reconstruction operation, the implant is positioned on the chest wall behind the pectoralis major muscle. Source: Internet
The pigeon had particularly large breast muscles that indicate powerful flight ( musculus pectoralis major for downstroke and the smaller musculus supracoracoideus for upstroke). Source: Internet
This operation is now reserved for tumors involving the pectoralis major muscle or recurrent breast cancer involving the chest wall. Source: Internet
Breathing may be assisted by other muscles that can raise the ribs, such as sternocleidomastoid, pectoralis major and minor as well as the scalenes. Source: Internet