n. [ See Tephrosia. ] (Min.) A silicate of manganese of an ash-gray color. [ 1913 Webster ]
n. [ Cf. F. néphrite. See nephritis. ] (Min.) A hard compact mineral, of a dark green color, formerly worn as a remedy for diseases of the kidneys, whence its name; kidney stone; a kind of
n. [ Cf. F. néphrite. See nephritis. ] (Min.) A hard compact mineral, of a dark green color, formerly worn as a remedy for diseases of the kidneys, whence its name; kidney stone; a kind of