'Hydrothorax' definitions:

Definition of 'hydrothorax'

(from WordNet)
noun
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

Definition of 'Hydrothorax'

From: GCIDE
  • Hydrothorax \Hy`dro*tho"rax\, n. [Hydro-, 1 + thorax.] (Med.) An accumulation of serous fluid in the cavity of the chest. [1913 Webster]