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waveguide

[weyv-gahyd]
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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.
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Compare optical fiber.

Origin of waveguide

First recorded in 1930–35; wave + guide
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for waveguide

waveguide

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
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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