micron

noun

mi·​cron ˈmī-ˌkrän How to pronounce micron (audio)

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.
These sheets remain suspended in liquid and measure over one micron across, much larger than those made with traditional mechanical methods. Bojan Stojkovski, Interesting Engineering, 14 Sep. 2025 Lab tests showed that even a microns-thick transparent layer of the new lotions effectively blocked UV light. Andrew Paul, Popular Science, 4 Sep. 2025 To resolve an Earth-size planet at 10 microns at a distance of about 30 light-years would require a telescope aperture approaching 20 meters (65.6 feet). Keith Cooper, Space.com, 1 Sep. 2025 Wildfire smoke falls under the category of pollutants known as PM2.5, which describes particles in the air smaller than 2.5 microns. Andrew Montequin, jsonline.com, 2 Aug. 2025 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

Browse Nearby Words

Cite this Entry

“Micron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micron. Accessed 22 Sep. 2025.

Kids Definition

micron

noun
mi·​cron ˈmī-ˌkrän How to pronounce micron (audio)

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

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