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steady-state theory
stead·y-state the·o·ry


noun 
Definition:
 
theory that universe is constant: a theory in astronomy that the universe has always existed at a uniform density that is maintained because new matter is created continuously as the universe expands
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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