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omnidirectional

[om-nee-di-rek-shuh-nl]
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adjective Electronics.
  1. sending or receiving signals in all directions: an omnidirectional microphone.
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Origin of omnidirectional

First recorded in 1925–30; omni- + directional
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for omnidirectional

omnidirectional

adjective
  1. (of an antenna) capable of transmitting and receiving radio signals equally in any direction in the horizontal plane
  2. (of a microphone or antenna) equally sensitive in all directions
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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

Word Origin and History for omnidirectional

adj.

1927, from omni- + directional (see direction).

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Online Etymology Dictionary, © 2010 Douglas Harper