Definition of "kidney"

An artificial kidney these days still means a refrigerator-sized dialysis machine. Such devices mimic the way real kidneys cleanse blood and eject impurities and surplus water as urine.

2013 June 1, “A better waterworks”, in The Economist‎, volume 407, number 8838, page 5 (Technology Quarterly)

[…] think of that, – a man of my kidney, – think of that, […]

c. 1597 (date written), William Shakespeare, “The Merry Wiues of Windsor”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, (please specify the scene number in lowercase Roman numerals)]

Millions in the World of this Man's Kidney

1692, Roger L’Estrange, “ (please specify the fable number.) (please specify the name of the fable.)”, in Fables, of Æsop and Other Eminent Mythologists: […], London: […] R[ichard] Sare, […]

Your poets, spendthrifts, and other fools of that kidney, pretend, forsooth, to crack their jokes on prudence.

30th June, 1788, Robert Burns, letter to Mr Robert Ainslie

I shall not want Honour in Heaven For I shall meet Sir Philip SidneyAnd have talk with Coriolanus And other heroes of that kidney.

1920, T.S. Eliot, A Cooking Egg‎

I once more desire my readers to consider that as I cannot keep an ingenious man to go daily to Will's under twopence each day merely for his charges, to White's under sixpence, nor to the Grecian without allowing him some plain Spanish, to be as able as others at the learned table; and that a good observer cannot speak with even Kidney at St. James's without clean linen; […]

1709, Richard Steele, The Tatler‎, volume 1