Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun One million cycles per second. Used especially as a radio-frequency unit.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A unit equal to one-million cycles per second.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun one million periods per second

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

mega- +‎ hertz

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