micron

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

Definition of micron

Examples of micron in a Sentence

Recent Examples on the Web

The new ruling covers drinks in plastic bottles and all plastic with a thickness of less than 30 microns (0.03 millimeters). Fox News, "Mount Everest gets plastics ban as officials battle garbage pileup on the famous peak: report," 23 Aug. 2019 The new ban goes into effect January 2020 and covers all plastics less than 30 microns in thickness, according to AFP. Adrianna Rodriguez, USA TODAY, "11 tons of trash were taken off Mount Everest. Now, officials are banning single-use plastics," 22 Aug. 2019 Lewis said smoke is made of small particles, some smaller than 2.5 microns in diameter. oregonlive.com, "What are the long-term health effects from wildfire smoke? Oregon doctors say it’s something they’re still learning about.," 22 July 2019 The Mylar material composing the sail is just 4.5 microns thick, or about one-tenth as thick as a human hair. Eric Berger, Ars Technica, "One legacy of Carl Sagan may take flight next week—a working solar sail," 20 June 2019 More insidiously, people are also inhaling noxious fine particles measuring less than 2.5 microns, or a fifth the size of a particle of dust or pollen. Daniel Oberhaus, WIRED, "The Health Effects of Wildfire Smoke May Last a Lifetime," 27 June 2019 The smallest particle a human eye can see is about 40 microns. Stephen Leahy, National Geographic, "Microplastics are raining down from the sky," 15 Apr. 2019 Imagine that the laws of physics prevent you from measuring anything smaller than 0.001 micron. Quanta Magazine, "Solution: ‘Is Infinity Real?’," 30 June 2016 The researchers first used a tiny glass needle, its tip measuring only 10 microns across, to inject a single droplet of ferromagnetic fluid between the embryo’s cells. Quanta Magazine, "‘Traffic Jams’ of Cells Help to Sculpt Embryos," 27 Sep. 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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More Definitions for micron

micron

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

Medical Definition of micron

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

called also micrometer, mu

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