meteoroid Meaning, Definition & Usage

  1. noun (astronomy) any of the small solid extraterrestrial bodies that hits the earth's atmosphere
    meteor.

WordNet

Me"te*or*oid noun
Etymology
Meteor + -oid.
Definitions
  1. (Astron.) A small body moving through space, or revolving about the sun, which on entering the earth's atmosphere would be deflagrated and appear as a meteor.
    These bodies [small, solid bodies] before they come into the air, I call meteoroids. H. A. Newton.

Webster 1913