pyelonephrosis py·e·lo·ne·phro·sis (pī'ə-lō-nə-frō'sĭs)
n.
Disease of the pelvis of the kidney.
| the offspring of a zebra and a donkey. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |