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nanosecond

[nan-uh-sek-uh nd, ney-nuh-]
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noun
  1. one billionth of a second. Abbreviation: ns, nsec

Origin of nanosecond

First recorded in 1955–60; nano- + second2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for nanosecond

nanosecond

noun
  1. one thousand-millionth of a secondSymbol: ns
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 nanosecond

n.

1959, from nano- + second (n.).

Online Etymology Dictionary, © 2010 Douglas Harper

nanosecond in Science

nanosecond

[nănə-sĕk′ənd]
  1. One billionth (10-9) of a second.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

nanosecond in Culture

nanosecond

[(nan-uh-sek-uhnd)]

A billionth of a second.

Note

The term is often used to refer to a very short time: “He missed having an accident by nanoseconds.”
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.