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.
Optomechanisms are a rich source of development in engineering, including telescopy, miniature projectors, tractor beams, and quantum optomechanical mirrors made from a few hundred atoms and only a few microns thick. — New Atlas, 4 Sep. 2026 Additionally, the average diameter of the cashmere fiber must not exceed 19 microns and the cashmere fibers in the wool product must contain no more than 3 percent (by weight) of cashmere fibers with average diameters that exceed 30 microns. — Angela Velasquez, Footwear News, 27 Aug. 2026 The photons emerged from an optical fiber just 5 microns in diameter, less than one-tenth the width of a human hair. — Rupendra Brahambhatt, Interesting Engineering, 23 Aug. 2026 The frame of this printer is rigid and stout to minimize error-inducing vibration during printing; HeyGears says layer positioning errors are no more than 2 microns. — Michael Lydick, PC Magazine, 21 Aug. 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 7 Sep. 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

Britannica.com: Encyclopedia article about micron

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