mi·​cro·​sec·​ond ˈmī-krō-ˌse-kənd How to pronounce microsecond (audio)
: one millionth of a second

Example Sentences

Recent Examples on the Web Modern experts have concluded that the movements are not orchestrated by any one leader, but rather by a chain reaction of microsecond influences. Stefano Pitrelli, Washington Post, 26 Jan. 2023 The 250 microsecond stimulus did so too, albeit marginally. Neuroskeptic, Discover Magazine, 8 Jan. 2015 The shift of mass would lengthen days by 0.06 microsecond, scientists said. Smriti Rao, Discover Magazine, 2 Mar. 2010 The robotic chef monitors more than 1,200 parameters every microsecond, from managing food quality to the point-of-sales machine. Stephanie Cain, Fortune, 18 Oct. 2022 This cannot be taken for granted for one microsecond. Adam Sobel, CNN, 12 Aug. 2022 Rylance, Flynn and Beale are especially gifted at raising an eyebrow just a millimeter high enough to suggest a fib is in progress or adding a microsecond of hesitancy here or there to enhance the effect. Leslie Felperin, The Hollywood Reporter, 14 Feb. 2022 The performance core also integrates a new microcontroller that can examine the needs of applications in a microsecond, even faster than a millisecond. Mark Hachman, PCWorld, 19 Aug. 2021 The question of leap seconds is contentious, because some scientists believe simply adjusting each day’s microsecond difference is better. Caroline Delbert, Popular Mechanics, 11 Jan. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'microsecond.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


International Scientific Vocabulary

First Known Use

1906, in the meaning defined above

Time Traveler
The first known use of microsecond was in 1906

Dictionary Entries Near microsecond

Cite this Entry

“Microsecond.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microsecond. Accessed 24 Mar. 2023.

Kids Definition


mi·​cro·​sec·​ond ˌmī-krō-ˈsek-ənd How to pronounce microsecond (audio)
: one millionth of a second

Medical Definition


mi·​cro·​sec·​ond ˈmī-krō-ˌsek-ənd, -ənt How to pronounce microsecond (audio)
: one millionth of a second

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