noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The presence of serous fluid (liquid) in the pleural cavity. uncountable, usually
2. 2
   accumulation of fluid in the pleural cavity (the space between the lungs and the walls of the chest) often resulting from disease of the heart or kidneys wordnet

Etymology

From hydro- + thorax.

Related phrases

pleural cavity

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.