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Webster 1913 Edition

Polemoscope

Po-lem′o-scope

,
Noun.
[Gr. [GREEK] war +
-scope
: cf. F.
polémoscope
.]
An opera glass or field glass with an oblique mirror arranged for seeing objects that do not lie directly before the eye; – called also
diagonal opera glass
, or
side opera glass
.

Webster 1828 Edition

Polemoscope

POLEM'OSCOPE

,
Noun.
[Gr. war, and to view.] An oblique perspective glass contrived for seeing objects that do not lie directly before the eye. It consists of a concave glass placed near a plane mirror in the end of a short round tube, and a convex glass in a hole in the side of the tube. It is called opera-glass, or diagonal opera-glass.

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