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missing mass

noun, Astrophysics.
the difference in mass in the universe between that observed to exist and that necessary for the closed universe model.
Origin of missing mass
First recorded in 1975-80 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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missing mass in Science
missing mass
See dark matter.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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