ureteroproctostomy UK /jʊˌriːtərəʊˌprɒktəˈstɒmi/US /jʊˌriːtəroʊˌprɑktəˈstɑmi/ noun1 •A form of urinary diversion involving the creation of an anastomosis between a ureter and the rectum. formsureteroproctostomies