n.; pl. Kidneys [ OE. kidnei, kidnere, from Icel. koiðr belly, womb (akin to Goth. gipus, AS. cwiþ womb) + OE. nere kidney; akin to D. nier, G. niere, OHG. nioro, Icel. n&ymacr_;ra, Dan. nyre, Sw. njure, and probably to Gr. nefro`s Cf. Kite belly. ] [ 1913 Webster ]

1. (Anat.) A glandular organ which excretes urea and other waste products from the animal body; a urinary gland. [ 1913 Webster ]

☞ In man and in other mammals there are two kidneys, one on each side of vertebral column in the back part of the abdomen, each kidney being connected with the bladder by a long tube, the ureter, through which the urine is constantly excreted into the bladder to be periodically discharged. [ 1913 Webster ]

2. Habit; disposition; sort; kind; as, a man of a different kidney. Shak. [ 1913 Webster +PJC ]

There are in later times other decrees, made by popes of another kidney. Barrow. [ 1913 Webster ]

Millions in the world of this man's kidney. L'Estrange. [ 1913 Webster ]

Your poets, spendthrifts, and other fools of that kidney, pretend, forsooth, to crack their jokes on prudence. Burns. [ 1913 Webster ]

☞ This use of the word perhaps arose from the fact that the kidneys and the fat about them are an easy test of the condition of an animal as to fatness. “Think of that, -- a man of my kidney; -- . . . as subject to heat as butter.” Shak. [ 1913 Webster ]

3. A waiter. [ Old Cant ] Tatler. [ 1913 Webster ]

Floating kidney. See Wandering kidney, under Wandering. --
Kidney bean (Bot.), a sort of bean; -- so named from its shape. It is of the genus Phaseolus (Phaseolus vulgaris). See under Bean. --
Kidney ore (Min.), a variety of hematite or iron sesquioxide, occurring in compact kidney-shaped masses. --
Kidney stone. (Min.) See Nephrite, and Jade. --
Kidney vetch (Bot.), a leguminous herb of Europe and Asia (Anthyllis vulneraria), with cloverlike heads of red or yellow flowers, once used as a remedy for renal disorders, and also to stop the flow of blood from wounds; lady's-fingers.

{ } a. Having the form or shape of a kidney; reniform; as, a kidney-shaped leaf; a kidney-shaped swimming pool. Gray. [ 1913 Webster +PJC ]

n. (Bot.) (a) A kind of saxifrage (Saxifrage stellaris). (b) The navelwort. [ 1913 Webster ]