micrometeorite

noun
mi·​cro·​me·​te·​or·​ite | \ ˌmī-krō-ˈmē-tē-ə-ˌrīt How to pronounce micrometeorite (audio) \

Definition of micrometeorite

1 : a meteorite so small that it can pass through the earth's atmosphere without becoming intensely heated
2 : a very small particle in interplanetary space

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Other Words from micrometeorite

micrometeoritic \ ˌmī-​krō-​ˌmē-​tē-​ə-​ˈri-​tik How to pronounce micrometeoritic (audio) \ adjective

Examples of micrometeorite in a Sentence

Recent Examples on the Web

The leak itself is a small hole two millimeters wide, and NASA suspects it was caused by a small micrometeorite punching a hole in the wall. Avery Thompson, Popular Mechanics, "An Astronaut Plugged the Leak on the Space Station With his Finger," 31 Aug. 2018 Because there’s only the one hole, that rules out a micrometeorite or some natural cause. Avery Thompson, Popular Mechanics, "The ISS Hole Came From Inside the Station, Says Cosmonaut," 26 Dec. 2018 Limestone would be dense enough to protect these micrometeorites from water and weather for billions of years. William Herkewitz, Popular Mechanics, "These Are The Oldest Meteorites Ever Discovered," 11 May 2016 On top of that, there are micrometeorites that come in on the moon. Sydney Pereira, Newsweek, "Life on the Moon: NASA Technologist Describes Our Future Lunar Colony," 16 Dec. 2017 To investigate the rocky space rain, Heck and his colleagues collected samples of micrometeorites more than 466 million years old from rock formations in the St. Petersburg region of Russia. Jason Daley, Smithsonian, "Ancient Asteroid Collision Is Still Raining Space Rocks Down on Earth," 25 Jan. 2017 The hollow could provide stable temperature conditions and protection from micrometeorites and cosmic ray radiation, Junichi Haruyama, a senior JAXA researcher, tells McCurry. Rachel Riederer, Smithsonian, "Out-of-This-World Facts for International Observe the Moon Night," 28 Oct. 2017 The not-so-great balls of fire—now the oldest micrometeorites ever found—started out as hunks of mostly iron and nickel. National Geographic, "World’s Oldest Space Pebbles Found in Australia," 11 May 2016 The not-so-great balls of fire—now the oldest micrometeorites ever found—started out as hunks of mostly iron and nickel. Andrew Tomkins, National Geographic, "World’s Oldest Space Pebbles Found in Australia," 11 May 2016

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'micrometeorite.' 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 micrometeorite

1949, in the meaning defined at sense 1

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Last Updated

1 Jun 2019

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Time Traveler for micrometeorite

The first known use of micrometeorite was in 1949

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More from Merriam-Webster on micrometeorite

Britannica.com: Encyclopedia article about micrometeorite

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