Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. One quadrillion (1015) hertz.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An SI unit of frequency equal to 1015 hertz.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

peta- +‎ hertz.

Examples

  • So to a first approximation, we have these things -- twenty-petahertz synapse firings.

    Kevin Kelly on the next 5,000 days of the web

  • Surely computers in thirty years will have some concept of speed, it probably just won’t be called petahertz.

    Computers in 2034

  • Futurist Jakob Nielsen asserts that home computers will have microprocessors running at 3 petahertz 300,000 gigahertz that have a petabyte’s worth of memory, a billion gigabytes of storage and a 250-gigabit broadband connection.

    Computers in 2034

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