pneumothorax Meaning, Definition & Usage
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noun 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)
WordNet
Pneu`mo*tho"rax noun
Etymology
Gr. air + E.Definitions
(Med.) A condition in which air or other gas is present in the cavity of the chest; -- called also pneumatothorax .