Usually means: Frequency unit, one quadrillion hertz.
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We found 9 dictionaries that define the word petahertz:

General (6 matching dictionaries)
  1. petahertz: American Heritage Dictionary of the English Language
  2. petahertz: Collins English Dictionary
  3. petahertz: Wiktionary
  4. petahertz: Dictionary.com
  5. Petahertz: Wikipedia, the Free Encyclopedia
  6. petahertz: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. petahertz: Encyclopedia

Medicine (1 matching dictionary)
  1. petahertz: Medical dictionary

Science (1 matching dictionary)
  1. How Many? A Dictionary of Units of Measurement (No longer online)

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Definitions from Wiktionary (petahertz)

▸ noun:  (metrology) An SI unit of frequency equal to 10¹⁵ hertz.

Similar:
attohertz, hectopascal, kilohertz, hertz, hectosecond, petahash, hectoamp, hectometer, hectoampere, hectometre, more...

Opposite:
hertz, kilohertz, megahertz, gigahertz, terahertz

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Similar:
attohertz, hectopascal, kilohertz, hertz, hectosecond, petahash, hectoamp, hectometer, hectoampere, hectometre, more...

Opposite:
hertz, kilohertz, megahertz, gigahertz, terahertz



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