| 单词 | periscope |
| 释义 | periscope[ per-uh-skohp ] / ˈpɛr əˌskoʊp / SEE SYNONYMS FOR periscope ON THESAURUS.COM nounan optical instrument for viewing objects that are above the level of direct sight or in an otherwise obstructed field of vision, consisting essentially of a tube with an arrangement of prisms or mirrors and, usually, lenses: used especially in submarines. a periscopic lens. Origin of periscopeFirst recorded in 1815–25; back formation from periscopic Words nearby periscopeperirectitis, perirhizoclasia, perisalpingitis, perisalpinx, perisarc, periscope, periscopic, perish, perishable, perished, perishing Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for periscopeBritish Dictionary definitions for periscopeperiscope / (ˈpɛrɪˌskəʊp) / nounany 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 Word Origin for periscopeC19: from Greek periskopein to look around; see peri-, -scope Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for periscopeperiscope [ pĕr′ĭ-skōp′ ] An instrument that has angled mirrors or prisms and allows objects not in the direct line of sight to be seen, often used on submarines and in military reconnaissance. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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