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petabyte

[pet-uh-bahyt]
noun
  1. 250 bytes, or 1,024 terabytes.
  2. (loosely) 1015 or a million billion bytes. Symbol: PB
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Origin of petabyte

peta- + byte
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for petabyte

petabyte

noun
  1. computing 10 15 or 2 50 bytes
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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
petabyte in Science

petabyte

[pĕt′ə-bīt]
  1. A unit of computer memory or data storage capacity equal to 1,024 terabytes (250 bytes).
  2. One quadrillion bytes. See Note at megabyte.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.