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cosmological constant

noun

, Astronomy.
  1. a term introduced by Einstein into his field equations of general relativity to permit a stationary, nonexpanding universe: it has since been abandoned in most models of the universe.


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Word History and Origins

Origin of cosmological constant1

First recorded in 1925–30

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Example Sentences

The universe, it turns out, expands, and Einstein considered the cosmological constant his “biggest blunder.”

But observations today suggest that, indeed, the cosmological constant is necessary.

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