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.

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The star γ is an irregular variable.

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

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

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