MEN'ILITE, noun A mineral substance found at Menil Montant near Paris, of the nature of silex, of a brown liver color on the interior, and ordinarily of a clear blue on the surface. It is found in the shape of the kidneys, of the size of the hand or larger; sometimes in globules of the size of a nut.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI