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.
The microscopic dust grains in the cloud come in various sizes, though all are generally on the order of a micron. Phil Plait, Scientific American, 13 Feb. 2025 Each stone is measured and matched with a basket that has been cut for diameter and depth at micron levels to ensure the perfect fit. Paige Reddinger, Robb Report, 28 Jan. 2025 The number stands for the respirator’s efficiency at filtering out particles that are 0.3 microns or larger. Bruce Y. Lee, Forbes, 10 Jan. 2025 The holes are 400 microns in diameter, per the company's Instagram page, which suggests that users can feel the holes with their fingertips. Ars Technica, 23 Dec. 2024 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

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Cite this Entry

“Micron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micron. Accessed 28 Feb. 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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