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

Keep scrolling for more

Other Words from micrometeorite

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

Examples of micrometeorite in a Sentence

Recent Examples on the Web Most of these molecules are likely stored in the voids between moon dust and other particles or entombed in the glassy residue of of micrometeorite impacts. Marcia Dunn, The Christian Science Monitor, "Evidence of water on the moon opens new frontiers," 27 Oct. 2020 Or they could be locked safely away in glass beads forged during micrometeorite impacts. Charlie Wood, Popular Science, "The moon is (slightly) wet, NASA confirms. Now what?," 27 Oct. 2020 Heat from the sun or micrometeorite impacts could cause hydroxyl molecules to collide to form H2O, Honniball says. Maya Wei-haas, National Geographic, "Water on moon’s surface may be more abundant than once thought," 26 Oct. 2020 Bennu's youngest constituents will be minerals and compounds altered by micrometeorite impacts, cosmic rays and solar flares. Dante S. Lauretta, Scientific American, "To Bennu and Back," 1 Aug. 2016 The surface is hit by micrometeorites and radiation, with no atmosphere to protect it. Ashley Strickland, CNN, "How a pandemic prepares us for exploring and living on Mars," 6 Apr. 2020 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

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.

See More

First Known Use of micrometeorite

1949, in the meaning defined at sense 1

Keep scrolling for more

Learn More about micrometeorite

Time Traveler for micrometeorite

Time Traveler

The first known use of micrometeorite was in 1949

See more words from the same year

Statistics for micrometeorite

Cite this Entry

“Micrometeorite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micrometeorite. Accessed 25 Feb. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

More from Merriam-Webster on micrometeorite

Britannica.com: Encyclopedia article about micrometeorite

Comments on micrometeorite

What made you want to look up micrometeorite? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

More Confusing Words—Quiz

  • cats on impossible timber
  • The magician ______ moved the selected card to the top of the deck.
Spell It

Can you spell these 10 commonly misspelled words?

 AlphaBear 2

Spell words. Make bears.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!