KID'NEY, noun [I have not found this word in any other language.] 1. The kidneys are two oblong flattened bodies, extending from the eleventh and twelfth ribs to the fourth lumbar vertebra, behind the intestines. Their use is to separate the urine from the blood. 2. Sort; kind. [A ludicrous use of the word.] 3. A cant term for a waiting servant.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI