hydropneumothorax

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

Medical Definition of hydropneumothorax 

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

called also pneumohydrothorax

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