micrometeoroid

noun
mi·​cro·​me·​te·​or·​oid | \ ˌmī-krō-ˈmē-tē-ə-ˌrȯid How to pronounce micrometeoroid (audio) \

Definition of micrometeoroid

Examples of micrometeoroid in a Sentence

Recent Examples on the Web Most of this material is being delivered by micrometeoroids from the Kuiper belt, a distant source of icy objects beyond the orbit of Neptune. Quanta Magazine, "Are Saturn’s Rings Really as Young as the Dinosaurs?," 26 Nov. 2019 These are known as micrometeoroids or simply space dust. John Meyer, The Know, "Clear sky tonight means you could see “fireball” meteors, despite full moon," 11 Nov. 2019 Every morning, at dawn, the planet is subjected to a spray of micrometeoroids, according to NASA. Jennifer Leman, Popular Mechanics, "Small Yet Mighty Mercury Still Holds Many Mysteries," 9 Nov. 2019 The new suit is also slightly sleeker, allowing a greater range of motion while still protecting the astronauts from radiation, temperature extremes, and micrometeoroids. Ashley Strickland, CNN, "These are the new spacesuits for the first woman and next man on the moon," 15 Oct. 2019 Given these two figures, and the bombardment rate by micrometeoroids, the rings must be young, the idea goes. Mike Wall, Scientific American, "Saturn’s Rings May Be Ancient After All," 17 Sep. 2019 However, the study's lead author, Aurélien Crida, disputes that, citing the bombardment rate of tiny meteorites (known as micrometeoroids) and the weight of the rings. Fox News, "Age of Saturn's rings debated as questions about life emerge," 17 Sep. 2019 Currently, very little data exists that describe what effect temperature extremes, lunar dust, micrometeoroids, solar radiation, etc. Joe Pappalardo, Popular Mechanics, "The U.S. Doesn't Want Anyone Messing With the Apollo Landing Sites," 23 Mar. 2018 What works in Webb's favor is the micro part of micrometeoroid: even at high speed, the particles don't have the mass to do catastrophic damage. Jeffrey Kluger, Time, "Eyes In the Sky," 22 June 2017

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

1954, in the meaning defined above

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The first known use of micrometeoroid was in 1954

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Cite this Entry

“Micrometeoroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/micrometeoroid. Accessed 24 Sep. 2020.

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Britannica.com: Encyclopedia article about micrometeoroid

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