periscope
nounmasculinetécnico/pɨ.ɾiʃ.ˈkɔ.pju/low
pe·ris·có·pi·o
Definition
An optical instrument that allows observation of objects or scenes located above an obstacle or outside the direct line of sight, composed of a system of mirrors or prisms.
The submarine commander observed the surface through the periscope.
Battle tanks also use periscopes.
Common collocations
submarine periscopetank periscopeperiscope tube
Etymology
Do grego 'peri-' (em volta) + '-skopein' (observar), através do francês 'périscope'.