1. Extremely small particles of rock or metal traveling through space, typically ranging from microscopic to a few millimeters in diameter.
Usage: Plural form; singular is micrometeoroid.; Used in astronomy and space science contexts.

Examples

• Micrometeoroids constantly bombard spacecraft orbiting Earth.
• The satellite's surface showed damage from impacts by micrometeoroids.
• Scientists study micrometeoroids to understand the composition of the solar system.
• Micrometeoroids pose a hazard to long-duration space missions.
• The space station's shielding protects astronauts from micrometeoroids traveling at high velocities.
• Micrometeoroids are believed to originate from comets and asteroid collisions.