mi·​cron | \ ˈmī-ˌkrän \

Definition of micron

Examples of micron in a Sentence

Recent Examples on the Web

Those compounds, which emit red, blue and green colors on the panel, must be applied through a mask with holes 17 to 25 microns big, according to BOE engineer Cui Fuyi. Yoko Kubota, WSJ, "China Targets Apple With Push Into Advanced Smartphone Screens," 22 July 2018 This 400 micron variance is less than half a millimeter (or the width of fewer than four sheets of paper at most) and this level of flatness won't change during normal use over the lifetime of the product. Samuel Axon, Ars Technica, "Some iPad Pros ship a little bent, and Apple says that’s normal," 20 Dec. 2018 Older ultramicroscopes were able to create planes approximately ten microns thick. David Grossman, Popular Mechanics, "These Glowing Fruit Fly Heads Can Help Us Understand the Human Brain," 26 Nov. 2018 The industry standard for such is that the unit must be able to remove at least 99.97% of particulates measuring 0.3 micron diameter in a lab setting. Rachel Rothman, Good Housekeeping, "Do Air Purifiers Actually Work?," 17 Dec. 2018 And the time is probably right to invest in a HEPA air purifier, which can capture particles as small as 0.3 microns, ensuring that, no matter the state outside, your home is safe. Calin Van Paris, Vogue, "For Those Grappling With California Wildfires, Dangerous Air Quality Is a New Risk," 16 Nov. 2018 Of particular concern is small particles that are less than 2.5 microns in diameter known as PM 2.5. Umair Irfan, Vox, "New Delhi is once again the most polluted city on Earth," 8 Nov. 2018 Wang’s team is making tiny GaN lasers the size of a micron — which is 1/100th the size of a human hair and too small to see with the naked eye — that can be used in microscopes to make research more precise. Angela Chen, The Verge, "Gallium nitride is the silicon of the future," 1 Nov. 2018 The aim of Argonne's April test was to use the Oleo Sponge to remove oil sheen, a coating of oil on water that is generally only one micron thick. Megan Geuss, Ars Technica, "New sponge for cleaning harbor oil leaks has a successful real-world test," 16 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'micron.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of micron

1879, in the meaning defined above

History and Etymology for micron

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

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Statistics for micron

Last Updated

5 Feb 2019

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Time Traveler for micron

The first known use of micron was in 1879

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More Definitions for micron


mi·​cron | \ ˈmī-ˌkrän \

Medical Definition of micron

: a unit of length equal to one millionth of a meter

called also micrometer, mu

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More from Merriam-Webster on micron

Rhyming Dictionary: Words that rhyme with micron

Spanish Central: Translation of micron

Nglish: Translation of micron for Spanish Speakers

Britannica.com: Encyclopedia article about micron

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