\Pec"to*ral\, a. [L. pectoralis, fr. pectus, -oris the
breast; cf. F. pectoral.]
1. 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. (Zo["o]l.) 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.
{Pectorial cross} (Eccl.), a cross worn on the breast by
   bishops and abbots, and sometimes also by canons.
{Pectorial} fins, or {Pectorials} (Zo["o]l.), fins situated
   on the sides, behind the gills. See Illust. under {Fin}.
{Pectorial rail}. (Zo["o]l.) See {Land rail}
   (b) under {Land}.
{Pectorial sandpiper} (Zo["o]l.), the jacksnipe
   (b) .

\Pec"to*ral\, n. [L. pectorale a breastplate, neut. of
pectorials.]
1. A covering or protecting for the breast.
2. (Eccl.)
   (a) A breastplate, esp. that worn by the Jewish high
       person.
   (b) A clasp or a cross worn on the breast.
3. A medicine for diseases of the chest organs, especially
   the lungs.