microsecond

noun

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

Examples of microsecond in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Both setups were calculated using a target temperature of 700 million Kelvin (60 keV), a pressure of 100,000 atmospheres, and a confinement time of one microsecond. — Aman Tripathi, Interesting Engineering, 30 Aug. 2026 Rather than querying a database or ingesting raw, uninterpreted telemetry streams, an AI model can use an in-memory digital twin to instantly access the full state of a live system, with all data reachable in microseconds. — William Bain, Forbes.com, 17 Aug. 2026 The camera read out 740 frames per second with exposures of 100 microseconds. — Jacek Krywko, ArsTechnica, 7 Aug. 2026 The microsecond a branch bumps an outdoor line, these smart systems detect the disruption and cut the power to that specific wire before a spark can even form. — Jasmine Garland, The Conversation, 7 July 2026 See All Example Sentences for microsecond

Word History

Etymology

International Scientific Vocabulary

First Known Use

1906, in the meaning defined above

Time Traveler
The first known use of microsecond was in 1906

Rhymes for microsecond

See All Rhymes for microsecond

Browse Nearby Words

microscopy
microsecond
microseism
See all Nearby Words

Cite this Entry

“Microsecond.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microsecond. Accessed 1 Sep. 2026.

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Kids Definition

microsecond

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

Medical Definition

microsecond

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

More from Merriam-Webster on microsecond

Thesaurus: All synonyms and antonyms for microsecond

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