Periscopic
Pronunciation : Per`i*scop"ic
Part of Speech : a.
Etymology : [Cf. F. p?riscopique.]
Definition : Defn: Viewing all around, or on all sides. Periscopic spectacles (Opt.), spectacles having concavo-convex or convexo-concave lenses with a considerable curvature corresponding to that of the eye, to increase the distinctness of objects viewed obliquely.
Source : Webster's Unabridged Dictionary, 1913