Polemoscope
Pronunciation : Po*lem"o*scope
Part of Speech : n.
Etymology : [Gr. -scope: cf. F. pol?moscope.]
Definition : Defn: An opera glass or field glass with an oblique mirror arranged for seeing objects do not lie directly before the eye; -- called also diagonal, or side, opera glass.
Source : Webster's Unabridged Dictionary, 1913