Etymology From Middle English uryne, from Latin ūrīna (“urine”), from Proto-Indo-European *uh₁r-, zero grade of *woh₁-r̥ (“water, liquid, milk”). Related to *h₁ówHdʰr̥ (“udder”) (see udder). Cognate with Old English ūriġ (“wet, moist”). Displaced native English land (“urine”) (from Middle English land, from Old English hland (“urine”)), though lant survives with a specialized sense.
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Medicine, Physiology, SciencesUsually Liquid waste consisting of water, salts, and urea, which is made in the kidneys, stored in the bladder, then released through the urethra.
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.2013 June 1, “A better waterworks”, in The Economist, volume 407, number 8838, page 5 (Technology Quarterly):
Etymology From Middle English uryne, from Latin ūrīna (“urine”), from Proto-Indo-European *uh₁r-, zero grade of *woh₁-r̥ (“water, liquid, milk”). Related to *h₁ówHdʰr̥ (“udder”) (see udder). Cognate with Old English ūriġ (“wet, moist”). Displaced native English land (“urine”) (from Middle English land, from Old English hland (“urine”)), though lant survives with a specialized sense.