kidney

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noun kid·ney \ ˈkid-nē \

Definition of kidney

plural kidneys
1 a :one of a pair of vertebrate organs situated in the body cavity near the spinal column that excrete waste products of metabolism, in humans are bean-shaped organs about 4¹/₂ inches (11¹/₂ centimeters) long lying behind the peritoneum in a mass of fatty tissue, and consist chiefly of nephrons by which urine is secreted, collected, and discharged into a main cavity whence it is conveyed by the ureter to the bladder
b :any of various excretory organs of invertebrate animals
2 :the kidney of an animal eaten as food
3 :sort or kind especially with regard to temperament
  • a nice helpful guy, of a different kidney entirely from the … Secret Police
  • —Paula Lecler

Examples of kidney in a Sentence

  1. a patient with a damaged kidney

  2. her new boyfriend is of a different kidney than what she usually dates

Recent Examples of kidney from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'kidney.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of kidney

Middle English


KIDNEY Defined for English Language Learners

kidney

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noun

Definition of kidney for English Language Learners

  • : either of two organs in your body that remove waste products from your blood and make urine

  • : an animal kidney used as food


KIDNEY Defined for Kids

kidney

play
noun kid·ney \ ˈkid-nē \

Definition of kidney for Students

plural kidneys
:either of a pair of organs near the backbone that give off waste from the body in the form of urine and in humans are bean-shaped

Medical Dictionary

kidney

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noun kid·ney \ ˈkid-nē \

medical Definition of kidney

plural kidneys
1 :one of a pair of vertebrate organs situated in the body cavity near the spinal column that excrete waste products of metabolism, in humans are bean-shaped organs about 4¹/₂ inches (11¹/₂ centimeters) long lying behind the peritoneum in a mass of fatty tissue, and consist chiefly of nephrons by which urine is secreted, collected, and discharged into the renal pelvis whence it is conveyed by the ureter to the bladder — compare mesonephros, metanephros, pronephros
2 :any of various excretory organs of invertebrate animals

Illustration of kidney



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