What term is used for stones formed in the kidneys?

The term used for stones formed in the kidneys is "Renal Calculi." This phrase derives from the Latin word "calculus," which means "small stone." Renal calculi can vary in size and may consist of various substances, including calcium oxalate, calcium phosphate, uric acid, struvite, and cystine.

While "Nephrolithiasis" also refers to the condition of having kidney stones, it is a broader term that encompasses the formation of these stones as a whole, rather than specifically naming them. "Ureteral stones" describe stones that have migrated down from the kidneys into the ureters, and "gallstones" are stones that form in the gallbladder, unrelated to the kidneys. Therefore, "Renal Calculi" specifically identifies the stones formed in the kidneys, making it the most accurate term in this context.