- an abnormal stone, or concretion, composed primarily of oxalates and phosphates, found in the kidney.
- Also called: renal calculus pathol a hard mass formed in the kidney, usually composed of oxalates, phosphates, and carbonates
- mineralogy another name for nephrite
- A small hard mass in the kidney that forms from deposits chiefly of phosphates and urates.nephrolith
- 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 .