micrometeoroid

noun

mi·​cro·​me·​te·​or·​oid ˌmī-krō-ˈmē-tē-ə-ˌrȯid 

: micrometeorite sense 2

Examples of micrometeoroid in a Sentence

Recent Examples on the Web

At that pace, even a tiny micrometeoroid has the ability to impart a significant kinetic blow upon striking a spacecraft en route to the moon, with potentially disastrous results for the astronaut crew inside. — Anthony Wood, Space.com, 7 June 2026

The flashes occurred as tiny fragments of cosmic material, or micrometeoroids, impacted the lunar surface. — Stephen Clark, ArsTechnica, 9 Apr. 2026

And while most space rocks burn up in Earth’s atmosphere, the moon’s surface is constantly pelted with micrometeoroids. — IEEE Spectrum, 1 July 2019

Word History

First Known Use

1954, in the meaning defined above