The Collaborative International Dictionary of English v.0.48:

Sphere \Sphere\, v. t. [imp. & p. p. Sphered; p. pr. & vb. n.
   Sphering.]
   1. To place in a sphere, or among the spheres; to insphere.
      [1913 Webster]

            The glorious planet Sol
            In noble eminence enthroned and sphered
            Amidst the other.                     --Shak.
      [1913 Webster]

   2. To form into roundness; to make spherical, or spheral; to
      perfect. --Tennyson.
      [1913 Webster] Spherical