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 Over perhaps a billion years, a drizzle of tiny micrometeorites hitting the moon will dissolve the boulders into finer soils called regolith. Quanta Magazine, "Asteroid Rate Jumped in Solar System’s Past," 17 Jan. 2019 These were compared to micrometeorites that have been recovered in Antarctica. Ashley Strickland, CNN, "A giant asteroid crash caused an ancient ice age on Earth, but also gave life a boost," 18 Sep. 2019 The planet is constantly bombarded by stuff from space, including a daily deluge of micrometeorites and a shower of radiation from the sun and more-distant stars. Wired, "Exploding Stars May Have Killed Off Prehistoric Predators," 20 Jan. 2019 The planet is constantly bombarded by stuff from space, including a daily deluge of micrometeorites and a shower of radiation from the sun and more-distant stars. Rebecca Boyle, WIRED, "Exploding Stars May Have Killed Off Prehistoric Predators," 20 Jan. 2019 The planet is constantly bombarded by stuff from space, including a daily deluge of micrometeorites and a shower of radiation from the sun and more-distant stars. Wired, "Exploding Stars May Have Killed Off Prehistoric Predators," 20 Jan. 2019 The planet is constantly bombarded by stuff from space, including a daily deluge of micrometeorites and a shower of radiation from the sun and more-distant stars. Rebecca Boyle, WIRED, "Exploding Stars May Have Killed Off Prehistoric Predators," 20 Jan. 2019 In reality, the regolith is made of rocks that have been ground up into a fine material over many years under the bombardment of micrometeorites and solar wind radiation. Ryan W. Miller, USA TODAY, "Buzz Aldrin and Neil Armstrong put a flag on the moon. Here's what you can and can't see in the iconic photo," 19 July 2019 The planet is constantly bombarded by stuff from space, including a daily deluge of micrometeorites and a shower of radiation from the sun and more-distant stars. Quanta Magazine, "How Nearby Stellar Explosions Could Have Killed Off Large Animals," 15 Jan. 2019

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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The first known use of micrometeorite was in 1949

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Last Updated

23 Feb 2020

Cite this Entry

“Micrometeorite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micrometeorite. Accessed 7 Apr. 2020.

More from Merriam-Webster on micrometeorite

Britannica.com: Encyclopedia article about micrometeorite

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