hydrothorax

noun

hy·​dro·​tho·​rax ˌhī-drə-ˈthȯr-ˌaks 

: an excess of serous fluid in the pleural cavity

especially : an effusion resulting from failing circulation (as in heart disease or from lung infection)

Word History

Etymology

New Latin

First Known Use

1793, in the meaning defined above

Medical Definition

hydrothorax

noun

hy·​dro·​tho·​rax -ˈthō(ə)r-ˌaks, -ˈthȯ(ə)r- 

plural hydrothoraxes or hydrothoraces -ˈthōr-ə-ˌsēz, -ˈthȯr- 

: an excess of serous fluid in the pleural cavity

especially : an effusion resulting from failing circulation (as in heart disease or from lung infection)