DIURIA 1 . f . Frequent diuresis during day 2. Place in Uttar Pradesh, India. 3 . Suffix of various organic components such as methylene diurea C3H8N4O, or lminoethylen diurea C6H15N5O2. Not to be confused with DYSURIA, which is painful urination of urine. Not to be confused with PIURIA which is the urination of pus in the urine, derived from a serious infection in the nephrouriary system, probably in the kidneys. An excessive increase in urine volume is called POLLAKIURIA and is due to other underlying diseases to be treated, such as diabetes mellitus.