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cosmic dust

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cosmic dust

–noun Astronomy.
fine particles of matter in space.

Origin:
1880–85
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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cosmic dust  
n.  Clouds of fine solid particles of matter in interstellar space.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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