Definition of micrometeoroid in English:

Share this entry


Pronunciation: /ˌmīkrōˈmēdēəˌroid/


A microscopic particle in space or of extraterrestrial origin that is small enough so that if it enters the earth’s atmosphere, it will not burn up but drift to the earth’s surface instead.
Example sentences
  • Hazardous micrometeoroids and radiation also threaten spacewalkers, and with no atmosphere and therefore no atmospheric pressure, fluids in the human body would boil.
  • If a micrometeoroid or piece of space debris penetrates the tank, the dregs can ignite, causing an explosion that shatters the rocket body and creates a cloud of debris.
  • He or she points out that the shuttle would be less exposed to micrometeoroids and orbital debris at the altitude of Hubble than at the lower altitude of the space station.

For editors and proofreaders

Syllabification: mi·cro·me·te·or·oid

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.