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meteoroid
me·te·or·oid [ mtee ə ròyd ] (plural me·te·or·oids)


noun 
Definition:
 
mass of rock in space: a mass of rock in space, often a remnant of a comet, that becomes a meteor when it enters the Earth's atmosphere and a meteorite when it falls to Earth.
See also  meteormeteorite

me·te·or·oid·al adjective
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