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stead'y state' the"ory

a theory in which the universe is assumed to have average properties that are constant in space and time so that new matter must be continuously and spontaneously created to maintain average densities as the universe expands. Also called stead'y state' mod"el. Cf. big bang theory.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.



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