{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. [1913 Webster]
The Collaborative International Dictionary of English. 2000.
Periscopic — Per i*scop ic, a. [Cf. F. p[ e]riscopique.] Viewing all around, or on all sides. [1913 Webster] [1913 Webster] {Periscopic spectacles} (Opt.), spectacles having concavo convex or convexo concave lenses with a considerable curvature corresponding… … The Collaborative International Dictionary of English
Lens — The transparent structure inside the eye that focuses light rays onto the retina (the nerve layer that lines the back of the eye, senses light and creates impulses that go through the optic nerve to the brain). The lens was named after the lentil … Medical dictionary
Optical Instruments — (Roget s Thesaurus) < N PARAG:Optical Instruments >N GRP: N 1 Sgm: N 1 optical instruments optical instruments Sgm: N 1 lens lens meniscus magnifier Sgm: N 1 microscope microscope megascope tienoscope GRP: N 2 Sgm: N 2 spect … English dictionary for students
Plennie L. Wingo — (January 24, 1895 ndash; October 2, 1993) walked backwards from Santa Monica, California to Istanbul, Turkey (about 13,000 km/8,000 miles) from 15 April 1931 to 24 October 1932 [ [http://www.recordholders.org/en/list/backwards running.html World… … Wikipedia
