hydropneumothorax

noun
hy·​dro·​pneu·​mo·​tho·​rax | \ ˌhī-drə-ˌn(y)ü-mə-ˈthō(ə)r-ˌaks, -ˈthȯ(ə)r- How to pronounce hydropneumothorax (audio) \
plural hydropneumothoraxes or hydropneumothoraces\ -​ˈthōr-​ə-​ˌsēz, -​ˈthȯr-​ How to pronounce hydropneumothoraces (audio) \

Medical Definition of hydropneumothorax

: the presence of gas and serous fluid in the pleural cavity

called also pneumohydrothorax