| an abnormal stone, or concretion, composed primarily of oxalates and phosphates, found in the kidney. |
kidney stone n.
A small hard mass in the kidney that forms from deposits chiefly of phosphates and urates. Also called nephrolith.
| kidney stone
A calculus that originates in the kidney and is usually composed of calcium salts, uric acid, cystine, and other compounds. Kidney stones cause extreme pain and bleeding if they obstruct the passage of urine in the kidney or in the ureter. They can often be treated with lithotripsy . |
