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[koh-ak-see-uh l] /koʊˈæk si əl/
Also, coaxal
[koh-ak-suh l] /koʊˈæk səl/ (Show IPA)
. having a common axis or coincident axes.
  1. (of a set of circles) having the property that each pair of circles has the same radical axis.
  2. (of planes) intersecting in a straight line.
(of a loudspeaker) having two or more cones with their centers mounted on the same axis.
Origin of coaxial
1880-85; co- + axial
Related forms
coaxially, adverb
uncoaxal, adjective
uncoaxial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for coaxial
  • Their motion is driven by six computer-controlled motors attached to the gearbox by timing belts and the coaxial drive shafts.
  • The energy is then tapped and sent down a waveguide that is known as a coaxial cable to your television.
  • Signals through today's ubiquitous coaxial cables move at about two-thirds the speed of light.
  • He attached the pulse generator to a coaxial cable that sent pulses to a copper loop antenna.
  • There's no power cord, and no need for a coaxial cable.
  • But that's chump change compared with what coaxial cable can deliver.
  • Initially, it was conceived to replace coaxial cables and remove the need to drill holes and string wires.
  • The computers are hooked by coaxial and fiber-optic cable to a server, which provides updated game statistics and video feeds.
  • Units are available for cable-television wire, called coaxial cable, as well as standard antenna wire.
  • coaxial cables are often used as a transmission line for radio frequency signals.
British Dictionary definitions for coaxial


having or being mounted on a common axis
(geometry) (of a set of circles) having all the centres on a straight line
(electronics) formed from, using, or connected to a coaxial cable
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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Word Origin and History for coaxial

"having a common axis," 1904, as a term in mathematics; coaxial cable is 1934. See co- + axial.

Online Etymology Dictionary, © 2010 Douglas Harper
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