Dictionary

periscope

noun peri·scope \ˈper-ə-ˌskōp\

: a long tube that contains lenses and mirrors and that is used to look over or around something and especially by a person in a submarine to see above the surface of the water

Full Definition of PERISCOPE

:  a tubular optical instrument containing lenses and mirrors by which an observer obtains an otherwise obstructed field of view

Illustration of PERISCOPE

Origin of PERISCOPE

International Scientific Vocabulary
First Known Use: 1879

Other Nautical Terms

avast, aweigh, flotsam, jib, keel, lee, port, starboard, stay

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