Kidney meaning

kĭdnē
Frequency:
The definition of a kidney is an organ in the body responsible for maintaining balance in the body by filtering waste and eliminating that waste in the form of urine.

An organ in your lower back that allows you to expel waste by creating urine is an example of a kidney.

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Temperament; kind.

A person of the same kidney.

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(anatomy) 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.
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The kidney of certain animals, eaten as food.
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An excretory organ of certain invertebrates.
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Either of a pair of glandular organs in the upper abdominal cavity of vertebrates, which separate water and waste products of metabolism from the blood and excrete them as urine through the bladder.
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The kidney of an animal, used as food.
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An organ in the body that filters the blood, producing urine.
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(anatomy) 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.
noun
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An excretory organ of certain invertebrates.
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Either of a pair of organs that are located in the rear of the abdominal cavity in vertebrates. The kidneys regulate fluid balance in the body and filter out wastes from the blood in the form of urine. The functional unit of the kidney is the nephron. Wastes filtered from the blood by the nephrons drain into the ureters, muscular tubes that connect each kidney to the bladder.
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This organ (of an animal) cooked as food.
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(figuratively) Constitution, temperament, nature.
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Origin of kidney

  • Middle English kidenei

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle English kednei, kidenei, from earlier kidnēre, kidenēre (“kidney”). Of obscure origin and formation. Probably a compound consisting of Middle English *kid, *quid (“belly, womb”), from Old English cwiþ, cwiþa (“belly, womb, stomach”) + Middle English nēre (“kidney”), from Old English *nēora (“kidney”), from Proto-Germanic *neurô (“kidney”), from Proto-Indo-European *negʷh-r- (“kidney”). If so, then related to Scots nere, neir (“kidney”), Dutch nier (“kidney”), German Niere (“kidney”), Danish nyre (“kidney”), Swedish njure (“kidney”).

    From Wiktionary

  • Alternate etymology traces the first element to Old English cēod, codd (“sack, scrotum”), from Proto-Germanic *keudō (“sack”) as the terms for testicle and kidney were often interchangeable in Germanic (compare Old High German nioro (“kidney", also "testicle”), Old Swedish vig-niauri (“testicle”). More at codpiece.

    From Wiktionary