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picosecond

[pee-kuh-sek-uh nd, pahy-]
noun
  1. one trillionth of a second. Abbreviation: ps, psec
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Origin of picosecond

First recorded in 1965–70; pico- + second2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for picosecond

picosecond

noun
  1. a million millionth of a second; 10 –12 second
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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

Word Origin and History for picosecond

n.

1966, from pico- + second (n.).

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Online Etymology Dictionary, © 2010 Douglas Harper