thoracic cavity


plural thoracic cavities
: the cavity of the thorax (see thorax sense 1) that is bounded below by the diaphragm, is enclosed by the sternum, ribs, and thoracic vertebrae, and that contains the heart and lungs
… an inflammation of the thoracic cavity which feels like a burning stiffness of the muscles …Harold Brodky

Word History

First Known Use

1779, in the meaning defined above

Time Traveler
The first known use of thoracic cavity was in 1779

Dictionary Entries Near thoracic cavity

Cite this Entry

“Thoracic cavity.” Dictionary, Merriam-Webster, Accessed 24 Mar. 2023.

Medical Definition

thoracic cavity

: the division of the body cavity that lies above the diaphragm, is bounded peripherally by the wall of the chest, and contains the heart and lungs
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