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.

Word History and Origins

Origin of cosmological constant¹

First recorded in 1925–30

Example Sentences

They also demonstrate, once again, that Einstein’s simplest form of dark energy—the cosmological constant—agrees the most with our observations.

From Singularity Hub 

Those are the three possibilities that make sense in a universe without a cosmological constant, or without dark energy.

From Quanta Magazine

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

From The Daily Beast

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

From The Daily Beast