also: ひつにょう
noun
urination; urinary
Medical and formal term for urination or the urinary system. Often used in compounds like 泌尿器 (urinary organs) or 泌尿器科 (urology).
泌尿器科で診察を受けた。
I had an examination at the urology department.
泌尿のトラブルは早めに医者に相談したほうがいい。
It's better to consult a doctor early about urinary problems.
排尿 is the more common clinical term for urination, while 泌尿 is broader, referring to the urinary system as a whole.
Compound of 泌 (secrete, ooze) and 尿 (urine). The reading ひにょう is the standard Sino-Japanese reading; ひつにょう is a variant reading of uncertain origin.