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missing mass

American  

noun

Astrophysics.

  1. the difference in mass in the universe between that observed to exist and that necessary for the closed universe model.

missing mass Scientific  
/ mĭs′ĭng /

  1. See dark matter

Etymology

Origin of missing mass

First recorded in 1975–80

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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