hemodialysis Syllabification: (he·mo·di·al·y·sis)Pronunciation: /ˌhēməˌdīˈaləsis/ (British haemodialysis)Definition of hemodialysis noun (plural hemodialyses /-ˌsēz/) Medicine kidney dialysis. hemodialysis in other Oxford dictionaries Definition of hemodialysis in the British & World English dictionary