Pneumothoraces

[noo-muh-thawr-aks, -thohr-, nyoo-] /ˌnu məˈθɔr æks, -ˈθoʊr-, ˌnyu-/

noun, Pathology.
1.
the presence of air or gas in the pleural cavity.
/ˌnjuːməʊˈθɔːræks/
noun
1.
the abnormal presence of air between the lung and the wall of the chest (pleural cavity), resulting in collapse of the lung
2.
(med) the introduction of air into the pleural cavity to collapse the lung: a former treatment for tuberculosis
n.

1821, from French pneumothorax (1803), coined by French physician Jean Marc Gaspard Itard (1774-1838) from Greek pneumon (see pneumonia) + thorax.

pneumothorax pneu·mo·tho·rax (nōō’mō-thôr’āks’, nyōō’-)
n.
Accumulation of air or gas in the pleural cavity, occurring as a result of disease or injury or as a treatment of tuberculosis and other lung diseases.
pneumothorax
(n’mō-thôr’āks’)
Accumulation of a gas, such as air, in the space between the pleurae of the lungs and the pleurae lining the chest wall (called the pleural cavity), occurring as a result of disease or injury or induced to collapse the lung in the treatment of tuberculosis and other lung diseases. A large pneumothorax is treated by inserting a syringe or a tube into the pleural cavity to aspirate air, which helps the collapsed lung to expand.