The Collaborative International Dictionary of English v.0.48:

Orthomorphic \Or`tho*mor"phic\, a. [Ortho- + morphic.] (Geom.)
   Having the right form.
   [1913 Webster]

   Orthomorphic projection, a projection in which the angles
      in the figure to be projected are equal to the
      corresponding angles in the projected figure.
      [1913 Webster] orthopaedic