from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various tubular optical instruments that contain reflecting elements, such as mirrors and prisms, to permit observation from a position displaced from a direct line of sight.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A form of viewing device that allows the viewer to see things at a different height level and usually with minimal visibility.
- n. : A general or comprehensive view.
- v. To rise and peer around, in the manner of a periscope.
from the GNU version of the Collaborative International Dictionary of English
- n. A general or comprehensive view.
from The Century Dictionary and Cyclopedia
- n. A general view or comprehensive summary. [Rare.]
- n. 2. An instrument by which objects in a horizontal view may be seen through a vertical tube.
- n. in photography, a photographic lens having a wide angle (90° or more).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an optical instrument that provides a view of an otherwise obstructed field
The periscope is turned on and you are able to view the outside by clicing on the lense.
How the levers on the right side of the periscope is placed decide what you see outside.
The company's Barrington, N.J., showroom burgeoned with government-surplus supplies, an array of telescopes and a functioning 38-foot periscope from a Japanese submarine.
There was a large hole in the pressure hull around one and a half meters to two meters, and now we know for sure that in result of that powerful blast for 75 or 80 percent of the crew died within 90 seconds since the submarine was at so-called periscope depth at the moment, which implies that all the crew were at battalion stations in the first two or three water-tight compartments.
"Then the periscope is the one weak spot in a submarine?" asked
The tinkle of broken glass sliding down the bamboo tube told that the periscope was a wreck.
The mirror affair, which Mr. Holcombe called a periscope, was put in that day and worked amazingly well.
To avoid this tell-tale an instrument called a periscope has been invented, which looks like a bottle on the end of a tube; this has lenses and mirrors that reflect into the interior of the submarine whatever shows above water.
The principle of the periscope is the same as that of the "busybody," familiar to householders, and which is placed on the sill of an upper window, so that a person inside the house may see who is at the front door.
Even the periscope is a much more complex instrument, containing radar and image manipulation devices, along with the traditional visual information.