from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Accumulation of air or gas in the pleural cavity, occurring as a result of disease or injury, or sometimes induced to collapse the lung in the treatment of tuberculosis and other lung diseases.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Presence of air inside the pleural cavity, usually caused by injury either to the lung or the chest wall.
from the GNU version of the Collaborative International Dictionary of English
- n. A condition in which air or other gas is present in the cavity of the chest; -- called also pneumatothorax.
from The Century Dictionary and Cyclopedia
- n. The presence of air in the pleural cavity. Also pneumatothorax.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. abnormal presence of air in the pleural cavity resulting in the collapse of the lung; may be spontaneous (due to injury to the chest) or induced (as a treatment for tuberculosis)
pneumo- + thorax (Wiktionary)