micrometeoroid

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Definitions from WordNet

Noun micrometeoroid has 1 sense

micrometeorite, micrometeoroid, micrometeor - a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere
--₁ is a kind of meteorite

Definitions from the Web

Micrometeoroid

Noun: A small particle of matter, typically ranging in size from a grain of sand to a few millimeters in diameter, that travels through space and enters the Earth's atmosphere.

Example Sentences:

During their journey through space, astronauts encounter micrometeoroids which can damage the exterior of the spacecraft.
Scientists study micrometeoroids to better understand the composition and origins of space debris.

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