Dilation of kidney pelvis and ureter, seen in hydronephrosis due to obstruction in the lower urinary tract. ... Origin: pyelo-+ ureter + G. Ektasis, a stretching ... (05 Mar 2000) ... 
Type: Term Pronunciation: pī′ĕ-lō-yū-rē′tĕr-ek′tă-sis Synonyms: hydronephrosis