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micrometeorite

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mi·cro·me·te·or·ite  (mkr-mt--rt)
n.
A tiny particle of meteoric dust, especially one of many that fall to the surface of the earth or moon.
micrometeorite [ˌmaɪkrəʊˈmiːtɪəˌraɪt]
n
(Earth Sciences / Geological Science) a tiny meteorite having a diameter of 10-40 micrometres, found esp in rainwater and seawater, having entered the atmosphere as a micrometeoroid (extremely small meteoroid)
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.micrometeorite - a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmospheremicrometeorite - a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere
micrometeor, micrometeoroid
meteorite - stony or metallic object that is the remains of a meteoroid that has reached the earth's surface
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Micrometeorites are different from meteorites in composition and texture, and this could be explained if they derive from comets, which are richer in organic material and crumblier than native asteroids.
Cosmic surprise: Many asteroids are comets by AFP / AFP Global Edition
There could be microbes living in the ice, but there could also be the dead bodies of microbes that used to live there, and there could be biological molecules that blew in from dust and micrometeorites.
Traces of microbes in shallow ice layers may help find life on icy ... by Asian News International
The daunting journey to the 11-ton Hubble carries considerably more risk of being hit by space debris or micrometeorites than a flight to the ISS, because the telescope orbits at almost twice the height of the ISS.
Second NASA shuttle poised for bold space rescue by AFP / AFP American Edition
 
 
 
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