
1) Hard thing to pass 2) Renal calculus
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https://www.crosswordclues.com/clue/kidney-stone

A disease characterized by small stones which are formed in the kidneys, passed along the ureters to the bladder, and expelled with the urine. Also called gravel.
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http://mckechnies.net/family/_references/medical.htm

concretion of minerals and organic matter that forms in the kidneys. Such stones may become so large as to impair normal renal function. Urine ... [5 related articles]
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http://www.britannica.com/eb/a-z/k/30

Known medically as a calculus (plural: calculi), a small, hard, pebble-like mass formed in the kidney from an accumulation of mineral substances. Passage of a kidney stone through the ureter (the tube leading from the kidney to the urinary bladder) causes intense pain known as renal colic. Kidney st...
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http://www.daviddarling.info/encyclopedia/K/kidney_stone.html

Synonym for nephrolithiasis ... <nephrology, urology> The presence of calculi in the kidney or collecting system. ... The calculi are usually small (2-12mm) solid, crystalline, concretions that develop in the kidney and eventually pass through the genitourinary tract. Stones may be composed of calcium, phosphate or uric acid. ... (27 Sep 1997...
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http://www.encyclo.co.uk/local/20973

a calculus in the kidney, composed of crystals precipitated from the urine on a matrix of organic matter. It may lead to inflammation or infection that causes intense pain (see renal colic). Most kidney stones are composed of calcium salts, which precipitate out of their normally soluble form in urine, usually because the...
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http://www.encyclo.co.uk/local/21001

Our Kidney stone Main Article provides a comprehensive look at the who, what, when and how of Kidney stone Kidney stone: A stone in the kidney (or lower down in the urinary tract). Kidney stones are a common cause of blood in the urine and pain in the abdomen, flank, or groin. Kidney stones occur in 1 in 20 people at some time in their life. The de...
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http://www.medterms.com/script/main/art.asp?articlekey=6650

See gravel.
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http://www.olivetreegenealogy.com/misc/disease.shtml

see gravel
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http://www.thornber.net/medicine/html/medgloss.html

[
n] - a calculus formed in the kidney
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http://www.webdictionary.co.uk/definition.php?query=kidney%20stone

a hard mass composed of substances from the urine that form in the kidneys
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https://www.encyclo.co.uk/local/20875

Small mass or lesion found in the kidney or urinary tract that can block the flow of urine.
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https://www.encyclo.co.uk/local/22789

Small mass or lesion found in the kidney or urinary tract that can block the flow of urine.
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https://www.encyclo.co.uk/local/23319

an abnormal stone, or concretion, composed primarily of oxalates and phosphates, found in the kidney. Also called
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https://www.infoplease.com/dictionary/kidney-stone

a solid piece of material that forms from crystallization of excreted substances in the urine.
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https://www.stanfordchildrens.org/en/topic/default?id=glossary---genitourin
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