Definition

Noun: 1. An organ in the body: One of a pair of bean-shaped organs in the abdomen of vertebrates. Their primary function is to filter waste products and excess substances (especially urea) from the blood to form urine, which is then excreted from the body. 2. Temperament or kind (archaic/figurative): Used to refer to a person's nature, character, or type.

Examples of Usage

• Noun (Organ):
  • The doctor said both her kidneys are functioning normally.
  • A healthy diet is important for kidney health.
  • He received a kidney transplant from his brother.
• Noun (Temperament/Kind - archaic):
  • They are two writers of the same kidney, both fond of satire. (This usage is now rare and literary.)

Advanced Usage

• "of the same kidney": Of the same nature, character, or type.
  • The new manager is of the same kidney as the old one—strict but fair.

Variants and Related Words

• Renal (adj): A medical term meaning relating to the kidneys.
  • The patient is suffering from renal failure.
• Kidney bean (n): A type of bean with a shape resembling a kidney.
• Kidney stone (n): A hard mass formed in the kidney from minerals in the urine.

Synonyms

• Organ (for the anatomical sense).
• Temperament, nature, ilk, sort (for the figurative sense).

Related Phrases

• Kidney dialysis: A medical procedure to artificially perform the blood-filtering function of the kidneys.
• Kidney donor: A person who gives one of their kidneys for transplantation.

Related Idioms

• To have a kidney of stone: To be very tough, unfeeling, or resilient. (This is a less common, metaphorical expression.)
  • You need a kidney of stone to work in that emergency room.

Noun

1. either of two bean-shaped excretory organs that filter wastes (especially urea) from the blood and excrete them and water in urine
   • urine passes out of the kidney through ureters to the bladder