C1noun2K

Kidney

UK /["/ˈkɪdni/"]/US /["/ˈkɪdni/"]/

Definition

either of the two organs in the body that remove waste products from the blood and produce urine

In simple words: A kidney is a bean-shaped organ in the body that helps clean the blood and make urine.

Examples

  • a kidney infection
  • steak and kidney pie

Usage notes

Used in medical contexts, discussions about health, or anatomy. Avoid in casual conversation unless the topic is health-related.

Grammar pattern

standalone noun

Memory hint

Think of 'kid' in 'kid-ney' as a young bean — it’s shaped like a kidney bean!

Collocations

  • kidney disease
  • kidney function
  • kidney transplant
  • kidney stones

Synonyms

  • renal organ
  • kidney bean

Antonyms

  • heart
  • lung

Common mistakes

  • Confused with 'liver' – the liver has a different function.
  • Mispronounced as 'kidneigh' instead of 'kid-nee'.