pectoral

Short definition from Wiktionary

Adjective

1. 1
   Of or pertaining to the breast, or chest.
2. 2
   Relating to, or good for, diseases of the chest or lungs.
3. 3
   Having the breast conspicuously colored.

Noun

1. 1
   A pectoral fin.
2. 2
   Protective armor for a horse's breast.
3. 3
   A covering or protection for the breast.
4. 4
   A breastplate, especially that worn by the Jewish high priest.
5. 5
   A clasp, cross, or ornamental square of cloth etc. worn upon the breast.
6. 6
   An ancient Egyptian item of jewelry worn upon the chest, often part of (or constituting) a necklace or collar.
7. 7
   A medicine for diseases of the chest organs, especially the lungs.