The Collaborative International Dictionary of English v.0.48:

Stereoscopic \Ste`re*o*scop"ic\, Stereoscopical
\Ste`re*o*scop"ic*al\, a.
   Of or pertaining to the stereoscope; characteristic of, or
   adapted to, the stereoscope; as, a stereoscopic effect; the
   stereoscopic function of the eyeglasses; stereoscopic views.
   -- Ste`re*o*scop"ic*al*ly, adv.
   [1913 Webster]
   [1913 Webster]

WordNet (r) 3.0 (2006):

stereoscopic
    adj 1: of or relating to a stereoscope; "stereoscopic lenses"
    2: of or relating to stereoscopy; "stereoscopic vision"

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "stereoscopic":
   3-D, cubic, dimensional, flat, fourth-dimensional, microscopic,
   proportional, space, space-time, spatial, spatiotemporal,
   spherical, superficial, surface, telescopic, three-dimensional,
   two-dimensional, volumetric