Illustration of periscope
periscope
noun
peri·scope ˈper-ə-ˌskōp 
: a tubular optical instrument containing lenses and mirrors by which an observer obtains an otherwise obstructed field of view
Example Sentences
Recent Examples on the Web Previous Xperia phones have offered standard telephoto lenses with 2x or 3x optical zoom; a periscope design would allow for 5x or more of optical reach without sacrificing image quality. 
Allison Johnson, The Verge, 28 Jan. 2021 Fast forward to the Galaxy S22 Ultra’s periscope camera, and the zoom experience has improved significantly. Chris Smith, BGR, 27 July 2022 The Galaxy S Ultra introduced Samsung’s first periscope zoom cameras. Chris Smith, BGR, 27 July 2022 The report also provides the specs for the iPhone 15 Pro Max’s periscope camera. Chris Smith, BGR, 14 July 2022 Android flagships have been using periscope lenses for years. Chris Smith, BGR, 14 July 2022 Calling up Track mode triggers a transformation in the gauge cluster, as the larger display tucks away into a narrow band like a periscope sight, leaving only the essentials of rpm, speed, and gear. Elana Scherr, Car and Driver, 18 May 2022 The quad camera array is completed with a 48 megapixel ultra wide sensor and a 5x periscope zoom camera. Ewan Spence, Forbes, 3 June 2022 Another wears a suit fully composed of brown sticks, the head obscured from within a dark hole that looks like a periscope fashioned from a tree trunk. New York Times, 16 May 2022 See More
Allison Johnson, The Verge, 28 Jan. 2021 Fast forward to the Galaxy S22 Ultra’s periscope camera, and the zoom experience has improved significantly. Chris Smith, BGR, 27 July 2022 The Galaxy S Ultra introduced Samsung’s first periscope zoom cameras. Chris Smith, BGR, 27 July 2022 The report also provides the specs for the iPhone 15 Pro Max’s periscope camera. Chris Smith, BGR, 14 July 2022 Android flagships have been using periscope lenses for years. Chris Smith, BGR, 14 July 2022 Calling up Track mode triggers a transformation in the gauge cluster, as the larger display tucks away into a narrow band like a periscope sight, leaving only the essentials of rpm, speed, and gear. Elana Scherr, Car and Driver, 18 May 2022 The quad camera array is completed with a 48 megapixel ultra wide sensor and a 5x periscope zoom camera. Ewan Spence, Forbes, 3 June 2022 Another wears a suit fully composed of brown sticks, the head obscured from within a dark hole that looks like a periscope fashioned from a tree trunk. New York Times, 16 May 2022 See More Word History
Etymology
International Scientific Vocabulary
First Known Use
1879, in the meaning defined above
Kids Definition
periscope
noun
peri·scope ˈper-ə-ˌskōp
: an instrument containing lenses and mirrors by which a person (as on a submarine) can get a view that would otherwise be blocked