irregular variable

noun

, Astronomy.

1. a variable star whose brightness variation is irregular.

Word History and Origins

Origin of irregular variable¹

First recorded in 1900–05

Example Sentences

The most interesting members are: σ Coronae, a binary consisting of a yellow star of the 6th magnitude, and a bluish star of the 7th magnitude; R Coronae, an irregular variable star; and T Coronae or Nova Coronae, a temporary or new star, first observed in 1866.

From Project Gutenberg

The star γ is an irregular variable.

From Project Gutenberg

It's a red giant, and it's an irregular variable.

From Project Gutenberg

The irregular, variable character of his visitor tended to heighten them, by producing an appearance of inexplicableness and mystery.

From Project Gutenberg