'Hydronephrosis' definitions:

Definition of 'hydronephrosis'

(from WordNet)
noun
Accumulation of urine in the kidney because of an obstruction in the ureter

Definition of 'Hydronephrosis'

From: GCIDE
  • Hydronephrosis \Hy`dro*ne*phro"sis\, n. [NL., Gr. "y`dwr water + ? a kidney.] (Med.) An accumulation of urine in the pelvis of the kidney, occasioned by obstruction in the urinary passages. [1913 Webster]