Periscopic
Periscopic , adjective
[Compare French périscopique.]
Viewing all around, or on all sides.
2.
of or relating to a periscope{2}.
Collocations (1)
Periscopic spectacles (Optics) , 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.