kidney

Either one of a pair of organs in the dorsal region of the vertebrate abdominal cavity, functioning to maintain proper water and electrolyte balance, regulate acid-base concentration, and filter the blood of metabolic wastes, which are then excreted as urine.

The kidney of certain animals, eaten as food.

An excretory organ of certain invertebrates.

Temperament; kind.

In min., a concretion shaped like a kidney.

In anatomy, a glandular structure whose function is the purification of the blood by the excretion of urine; one of the renes or reins; a renal organ.

Anything resembling a kidney in shape or otherwise, as a potato.

plural The inmost parts; the reins.

A waiting-servant.

A glandular organ which excretes urea and other waste products from the animal body; a urinary gland.