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[mahy-kruh-sek-uh nd] /ˈmaɪ krəˌsɛk ənd/
a unit of time equal to one millionth of a second. Symbol: μsec.
Origin of microsecond
First recorded in 1905-10; micro- + second2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for microsecond
Contemporary Examples
Historical Examples
  • microsecond by slow microsecond the Vangs grew and grew and grew.

    Masters of Space Edward Elmer Smith
  • No chart can keep up to the microsecond on these asteroid movements.

    Eight Keys to Eden Mark Irvin Clifton
  • Icarus will be within the star only a matter of a microsecond.

    The Variable Man Philip K. Dick
  • Force of a hydrogen bomb—forty thousand innocent people gone in a microsecond.

  • Within its certain, limited timing-capacity, it could establish or break a contact within the thousandth of a microsecond.

    Talents, Incorporated William Fitzgerald Jenkins
British Dictionary definitions for microsecond


one millionth of a second μs
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
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Word Origin and History for microsecond

1906, from micro- + second (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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microsecond in Science
A unit of time equal to one millionth (10-6) of a second.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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