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A very small, often dust-sized meteoroid.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Astronomy) an extremely small meteoroid
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Noun||1.||micrometeoroid - a meteorite or meteoroid so small that it drifts down to earth without becoming intensely heated in the atmosphere|
meteorite - stony or metallic object that is the remains of a meteoroid that has reached the earth's surface
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