Found 1 items, similar to diagonal opera glass.
English → English (gcide)
Definition: diagonal opera glass
Polemoscope
\Po*lem"o*scope\, n. [Gr. ? war + -scope: cf. F.
pol['e]moscope.]
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.
[1913 Webster]
