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pyeloureterectasis

(pī′ə-lō-yu-rē′tə-rĕktə-sĭs, -yur′ĭ-tə-)
n.
  1. Dilation of the pelvis of the kidney and the ureter.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.