The Collaborative International Dictionary of English v.0.48:

nephrite \neph"rite\ (?; 277), n. [Cf. F. n['e]phrite. 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 jade. It varies in color from white
   to dark green. It is the more common and less valuable
   variety of jade, the other being jadeite. Large deposits are
   found in Australia. Called also nephritic stone. See also
   Jade. --[MW10]
   [1913 Webster +PJC] Nephritic

The Collaborative International Dictionary of English v.0.48:

Nephritic \Ne*phrit"ic\, Nephritical \Ne*phrit"ic*al\, a. [L.
   nephriticus, Gr. nefritiko`s: cf. F. n['e]phr['e]tique. See
   Nephritis.]
   1. Of or pertaining to the kidneys or urinary organs; renal;
      as, a nephritic disease.
      [1913 Webster]

   2. (Med.)
      (a) Affected with a disease of the kidneys; as, a
          nephritic patient.
      (b) Relieving disorders of the kidneys; affecting the
          kidneys; as, a nephritic medicine.
          [1913 Webster]

   3. Of or pertaining to nephrite.
      [PJC]

   Nephritic stone (Min.), Nephrite; jade. See Nephrite.
      [1913 Webster]