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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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Recent Examples of micrometeorite from the Web
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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.
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The not-so-great balls of fire—now the oldest micrometeorites ever found—started out as hunks of mostly iron and nickel.
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Its main job is to keep the craft from being punctured by micrometeorites like an expensive balloon.
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.
First Known Use of micrometeorite
1949
Learn More about micrometeorite
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Britannica.com: Encyclopedia article about micrometeorite
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