micron

noun

mi·​cron ˈmī-ˌkrän How to pronounce micron (audio)
: micrometer entry 2

Examples of micron 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.
The company says its machine prints at a layer thickness of 10-20 microns – less than that of a human hair – for precise details using its motion control system. — New Atlas, 27 July 2026 Plus a micron filter — that stops algae from escaping the bucket into the pond. — Lucia Cheng, Des Moines Register, 21 July 2026 In a typical wildfire, the nasty particles that harm human health are about the size of one micron, Reid said. — Seth Borenstein, Chicago Tribune, 17 July 2026 All of these dimensions are thought to be as small as physically possible — close to the Planck scale (10-35 meters) — but the researchers proposed that the dark dimension could be significantly bigger than the others — on the order of a micron (10-6 meters). — Quanta Magazine, 22 June 2026 See All Example Sentences for micron

Word History

Etymology

New Latin, from Greek mikron, neuter of mikros small — more at micr-

First Known Use

1879, in the meaning defined above

Time Traveler
The first known use of micron was in 1879

Rhymes for micron

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Browse Nearby Words

Micromys
micron
micronephridium
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Cite this Entry

“Micron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micron. Accessed 5 Aug. 2026.

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Kids Definition

Medical Definition

micron

noun
mi·​cron ˈmī-ˌkrän How to pronounce micron (audio)
: a unit of length equal to one millionth of a meter

called also micrometer, mu

More from Merriam-Webster on micron

Nglish: Translation of micron for Spanish Speakers

Britannica.com: Encyclopedia article about micron

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