extremely low frequency
nounRadio.
any frequency between 30 and 300 hertz. Abbreviations: ELF, elf
Origin of extremely low frequency
1First recorded in 1965–70
Words Nearby extremely low frequency
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British Dictionary definitions for extremely low frequency
extremely low frequency
noun
a radio frequency or radio-frequency band below 3 kilohertz: Abbreviation: ELF
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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