pyopneumothorax
noun
pyo·pneu·mo·tho·rax
-ˌn(y)ü-mə-ˈthō(ə)r-ˌaks, -ˈthȯ(ə)r- 
plural pyopneumothoraxes or pyopneumothoraces
-ˈthō-rə-ˌsēz
: a collection of pus and air or other gas in the pleural cavity
Cite this Entry
“Pyopneumothorax.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/pyopneumothorax. Accessed 4 Nov. 2025.
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