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transmission line

noun Electricity.
  1. a system of conductors, as coaxial cable, a wave guide, or a pair of parallel wires, used to transmit signals.
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Origin of transmission line

First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for transmission line

transmission line

noun
  1. a coaxial cable, waveguide, or other system of conductors that transfers electrical signals from one location to anotherSometimes shortened to: line
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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