Meteoroid
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A meteoroid is a relatively small (sand- to boulder-sized) fragment of debris in the Solar System. When entering a planet's atmosphere, the meteoroid heats up and partially or completely vaporizes. The gas along the path of the meteoroid becomes ionized and glows. The trail of glowing vapor is called a meteor, or shooting star. If any portion of the meteor survives to reach the ground, it is then referred to as a meteorite.
See also
de:Meteoroid hr:Meteoroid he:מטאורואיד nl:Meteorode pl:Meteoroid sk:Meteoroid fi:Meteoroidi sv:Meteoroid th:สะเก็ดดาว zh:流星体