Noun

(en-noun)

(physiology) Liquid excrement consisting of water, salts and urea, which is made in the kidneys, stored in the bladder, then released through the urethra.

* {{quote-magazine, title=A better waterworks, date=2013-06-01, volume=407, issue=8838

, page=5 (Technology Quarterly), magazine=(The Economist) citation , passage=An artificial kidney these days still means a refrigerator-sized dialysis machine. Such devices mimic the way real kidneys cleanse blood and eject impurities and surplus water as urine .}}