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a combining form used in the names of units of measure equal to one quadrillion (10 15) of a given base unit:
People for the Ethical Treatment of Animals
denoting 1015: petametres, P

acronym for People for the Ethical Treatment of Animals; the group’s website says it was founded in 1980.

peta- pref.
One quadrillion (1015): petagram.

People for the Ethical Treatment of Animals


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    [pet-uh-bahyt] /ˈpɛt əˌbaɪt/ noun 1. 2 50 , or 1,024 . 2. (loosely) 10 15 or a million billion bytes. Symbol: PB. /ˈpɛtəˌbaɪt/ noun 1. (computing) 1015 or 250 bytes petabyte (pět’ə-bīt) unit 2^50 = 1,125,899,906,842,624 bytes = 1024 terabytes or roughly 10^15 bytes. 1024 petabytes is one exabyte. Google is estimated (http://www.cio.com/article/135700/Seven_Wonders_of_the_IT_World/3) to store […]

  • Petach-tikva

    [pe-tahkh tik-vah] /ˈpɛ tɑx ˈtɪk vɑ/ noun 1. a city in W Israel, NE of Tel Aviv.

  • Petaflops

    unit 10^15 flops or 1000 teraflops. No computer has achieved this performance yet. (1997-07-21)

  • Petahertz

    [pet-uh-hurts] /ˈpɛt əˌhɜrts/ noun 1. one quadrillion (10 15) hertz. Abbreviation: PHz.

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