thoracic

adj. of or related to the chest cavity

This article mainly refers to animal anatomy. See Chest for the human anatomy article.The thorax is a division of an animal's body that lies between the head and the abdomen.In mammals, the thorax is the region of the body formed by the sternum, the thoracic vertebrae and the ribs. It extends from the neck to the diaphragm, not including the upper limbs. The heart and the lungs reside in the thoracic cavity, as well as many blood vessels. The inner organs are protected by the rib cage and the sternum.
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Thoracic /tho·rac·ic/ pectoral; pertaining to the thorax. tho·rac·ic adj. Of, relating to, or situated in or near the thorax. [more]Thoracic - Community and Resources

Adjective
1. of or relating to the chest or thorax; "pectoral organ"
(synonym) pectoral
(pertainym) thorax, chest, pectus

(n.)
One of a group of fishes having the ventral fins placed beneath the thorax or beneath the pectorial fins.
  

(a.)
Of or pertaining to the thorax, or chest.