hydrothorax

== English == === Etymology === From hydro- +‎ thorax. === Noun === hydrothorax (usually uncountable, plural hydrothoraxes or hydrothoraces) (medicine) The presence of serous fluid (liquid) in the pleural cavity. Hypernym: effusion Coordinate terms: hemothorax (blood); pneumothorax (air or other gas) ==== Translations ====