English Lexicon

Kidney

/ˈkɪd.ni/
nounCEFR B1 (Intermediate)Top #1500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    One of a pair of organs in the body that filter waste from the blood and produce urine.

    "The doctor explained how the kidneys work to filter toxins from the bloodstream."
  2. 2

    The organ in animals that serves a similar function.

    "In many species, the kidneys are crucial for maintaining fluid balance."

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Synonyms (3)
Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

The word 'kidney' originates from the Old English 'cyning', which is related to the Proto-Germanic '*kidnō', referring to the organ responsible for filtering blood and producing urine. The term has evolved through Middle English, reflecting the anatomical understanding of the organ's function.

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