The Collaborative International Dictionary
Pyopneumothorax
Pyopneumothorax \Py`op*neu`mo*tho"rax\, n. [Gr. ? pus + E. pneumothorax.] (Med.) Accumulation of air, or other gas, and of pus, in the pleural cavity.
Wiktionary
pyopneumothorax
n. (context medicine English) The accumulation of air (or other gas) and pus in the pleural cavity.