The Collaborative International Dictionary
pneumatothorax
Pneumothorax \Pneu`mo*tho"rax\, n. [Gr. ? air + E. thorax.] (Med.) A condition in which air or other gas is present in the cavity of the chest; -- called also pneumatothorax.
Wiktionary
pneumatothorax
n. (alternative form of pneumothorax English)