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1 definition found

From: Webster's Revised Unabridged Dictionary (1913)

 Per·i·scop·ic a.  Viewing all around, or on all sides.
 2. of or relating to a periscope2.
 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.
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