ureteropyeloneostomy

ure·tero·py·elo·ne·os·to·my yu̇-.rēt-ə-rō-.pī-(ə-)lō-nē-'äs-tə-mē n, pl -mies surgical creation of a new channel joining a renal pelvis to a ureter

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ure·tero·py·elo·ne·os·to·my (u-re″tər-o-pi″ə-lo-ne-osґtə-me) ureteropyelostomy.