urinalysis Syllabification: (u·ri·nal·y·sis)Pronunciation: /ˌyo͝orəˈnaləsis/Definition of urinalysis noun (plural urinalyses /-ˌsēz/) Medicine analysis of urine by physical, chemical, and microscopical means to test for the presence of disease, drugs, etc.. urinalysis in other Oxford dictionaries Definition of urinalysis in the British & World English dictionary