micrometeoroid
/ˌmaɪkroʊˈmitiəˌrɔɪd/
noun
- A very small piece of space debris or dust that travels through space, smaller than a meteoroid.
- Spacecraft are designed to withstand impacts from micrometeoroids.
- A micrometeoroid can travel faster than a bullet.
- The telescope detected a cloud of micrometeoroids near the comet.