GNU Collaborative International Dictionary of English

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1.       
   Pectoral , a. [L. pectoralis, fr. pectus, -oris the breast; cf. F. pectoral.]
   Of or pertaining to the breast, or chest; as, the pectoral muscles.
   1913 Webster
   Relating to, or good for, diseases of the chest or lungs; as, a pectoral remedy.
   1913 Webster
   (Zool.) Having the breast conspicuously colored; as, the pectoral sandpiper.
   1913 Webster
   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. See Illust. under Fin. -- Pectoral rail. (Zool.) See Land rail (b) under Land. -- Pectoral sandpiper (Zool.), the jacksnipe (b).
   1913 Webster