Of or pertaining to the breast, or chest; as, the pectoral muscles.
2.
Relating to, or good for, diseases of the chest or lungs; as, a pectoral remedy.
3.
(Zool.) Having the breast conspicuously colored; as, the pectoral sandpiper.
Pectoral arch, or Pectoral girdle (Anat.), the two or more bony or cartilaginous pieces of the vertebrate skeleton to which the fore limbs are articulated; the shoulder girdle. In man it consists of two bones, the scapula and clavicle, on each side.
Pectoral cross (Eccl.), a cross worn on the breast by bishops and abbots, and sometimes also by canons.
Pectoral fins, or Pectorals (Zool.), fins situated on the sides, behind the gills.
Pectoral rail. (Zool.) See Land rail (b) under Land.
