From The Collaborative International Dictionary of English v.0.48:
Meteoroid \Me"te*or*oid\ (m[=e]"t[-e]*[~e]r*oid), n. [Meteor +
-oid.] (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.
[1913 Webster]
These bodies [small, solid bodies] before they come
into the air, I call meteoroids. --H. A.
Newton.
[1913 Webster]