periscope


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periscope
Light enters the top lens of a periscope, reflects off a mirror set at a 45 degree angle, travels down the periscope tube, and reflects off a second mirror, also set at a 45 degree angle. Light that reflects off the second mirror exits through the bottom lens and into the eye of the user.

per·i·scope

 (pĕr′ĭ-skōp′)
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.

per′i·scop′ic (-skŏp′ĭk), per′i·scop′i·cal (-ĭ-kəl) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

periscope

(ˈpɛrɪˌskəʊp)
n
any of a number of optical instruments that enable the user to view objects that are not in the direct line of vision, such as one in a submarine for looking above the surface of the water. They have a system of mirrors or prisms to reflect the light and often contain focusing lenses
[C19: from Greek periskopein to look around; see peri-, -scope]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

per•i•scope

art at periosteum
(ˈpɛr əˌskoʊp)

n.
an optical instrument for viewing objects in an obstructed field of vision, consisting of a tube with an arrangement of prisms or mirrors and, usu., lenses: used esp. in submarines.
[1815–25; back formation from periscopic]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
click for a larger image
periscope
Light enters the top lens of the periscope, reflects off a mirror set at a 45° angle, travels down the periscope tube, and reflects off a second mirror, also set at a 45° angle. The light that reflects off the second mirror exits through the bottom lens and into the eye of the user.

per·i·scope

(pĕr′ĭ-skōp′)
An instrument that has angled mirrors or prisms and allows objects not in the direct line of sight to be seen.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.periscope - an optical instrument that provides a view of an otherwise obstructed fieldperiscope - an optical instrument that provides a view of an otherwise obstructed field
optical instrument - an instrument designed to aid vision
pigboat, submarine, U-boat, sub - a submersible warship usually armed with torpedoes
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
بيرسكوب: مِنْظار الغَوّاصات والخَنادِق
periskop
periskop
periszkóp
sjónpípa, hringsjá
periskopas
periskops
periskop

periscope

[ˈperɪskəʊp] Nperiscopio m
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

periscope

[ˈpɛrɪskəʊp] npériscope m
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

periscope

nPeriskop nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

periscope

[ˈpɛrɪˌskəʊp] nperiscopio
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

periscope

(ˈperiskəup) noun
a tube containing mirrors, through which a person can look in order to see things which cannot be seen from the position the person is in, especially one used in submarines when under water to allow a person to see what is happening on the surface of the sea.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
References in classic literature ?
At first they sought to discover his location in No Man's Land; but when an officer looking over the parapet through a periscope was struck full in the back of the head with a rifle bullet which passed through his skull and fell to the bottom of the trench they realized that it was beyond the parados rather than the parapet that they should search.
Hugging the parados, messengers carried the word in both directions and presently periscopes were leveled above the parados and keen eyes were searching out the traitor.
I rose, also, and over the ship's side, I saw not two hundred yards distant the periscope of a submarine, while racing toward the liner the wake of a torpedo was distinctly visible.
Ever since entering the U-boat zone we had been on the lookout for periscopes, and children that we were, bemoaning the unkind fate that was to see us safely into France on the morrow without a glimpse of the dread marauders.
Almost at their side the periscope of a submarine had suddenly appeared.
The sub was only at periscope depth for an estimated 80 seconds as opposed to the recommended 3-5 minutes, significantly limiting opportunities for visual and electronic detection.
You've made a periscope, a tool that uses mirrors to help you see around obstacles.
Evans comes to SPS Commerce from Periscope Marketing Communications where he was director of interactive marketing.
Even though it was still dark on the surface, I didn't want the periscope breaking the surface any more than was necessary.
(NYSE: QUAD) plans to acquire Minnesota, US-based creative agency Periscope to create a platform for creating marketing campaigns across all media channels, the company said.
M2 EQUITYBITES-November 28, 2018-Quad/Graphics Plans Acquisition of Periscope to Expand Marketing Capabilities