Micrometeoroid

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    an extraterrestrial particle less than a millimeter in size
  2. 2
    a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere wordnet

Synonyms

All synonyms
fireballmeteormicrometeormicrometeoritemicrometeoriteradiant

Example

More examples

"Today's spacesuits are pressurized, have an oxygen supply, protect the astronaut from micrometeoroid bombardment while spacewalking, and insulate the astronaut from the severe temperature changes experienced in space."

Etymology

From micro- + meteoroid.

Related phrases

cosmic dustspace debris

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.