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extremely high frequency

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noun Radio.
  1. any frequency between 30 and 300 gigahertz. Abbreviation: EHF, ehf
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Origin of extremely high frequency

First recorded in 1950–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for extremely high frequency

extremely high frequency

noun
  1. a radio frequency between 30 000 and 300 000 megahertzAbbreviation: EHF
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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