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waveguide

[weyv-gahyd] /ˈweɪvˌgaɪd/
noun, Electronics, Optics.
1.
a conduit, as a metal tube, coaxial cable, or strand of glass fibers, used as a conductor or directional transmitter for various kinds of electromagnetic waves.
Compare optical fiber.
Origin
1930-1935
1930-35; wave + guide
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for wave-guide

waveguide

/ˈweɪvˌɡaɪd/
noun
1.
(electronics) a solid rod of dielectric or a hollow metal tube, usually of rectangular cross section, used as a path to guide microwaves
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
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