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

A cosmological constant is a famous part of Einstein's General Relativity theory, and refers to an arbitrary constant that is present in all related field equations.

From Salon

Theorists could account for this force by adding a cosmological constant, lambda, to Albert Einstein’s theory of gravity.

From Science Magazine

Another is that dark energy isn’t the cosmological constant, meaning it might radically change over time.

From Scientific American

One solution assumes dark energy isn’t a cosmological constant, but is due to some kind of new physics.

From Science Magazine

In a Universe explained by Einstein's theory with a cosmological constant, black holes are immersed in a cosmological accelerated background.

From Science Daily