- artificial s. a specially calcined gypsum derivative similar to plaster of Paris, but stronger, because the grains are nonporous.
- bladder s. urinary tract calculi in the bladder. Throughout most of the history of humans, this was the predominant form of urinary tract s. disease, mentioned in the Hippocratic oath, and giving rise to the common ancient surgical procedure, lithotomy. In much of the world, bladder s. disease has become uncommon and renal and ureteral stones (which are usually of different origins) have become more common. Bladder stones are now typically seen in patients with neurogenic bladders, urinary tract reconstruction, or infravesical obstruction. SYN: bladder calculus.
- tear s. SYN: dacryolith.
- vein s. SYN: phlebolith.
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Shanghai Trial of Nifedipine in the Elderly
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stone 'stōn n
1) CALCULUS (1)
2) pl usu stone any of various units of weight esp an official British unit equal to 14 pounds (6.3 kilograms)
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n.
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(stōn) 1. calculus. 2. a unit of weight in Great Britain, the equivalent of 14 pounds (avoirdupois), or about 6.34 kg. 3. an abrading instrument or tool, such as one used for sharpening instruments.Medical dictionary. 2011.