Mira-type variable

Mira-type variable

[¦mir·ə‚tīp ′ver·ē·ə·bəl]
(astronomy)
A member of a class of long-period variable stars whose prototype is the star Mira and that exhibit a periodic change in brightness with a time interval between 100 and 1000 days and a range variation of 2.5 magnitudes or more, but that have some cycles that may be much brighter or fainter than others.
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References in periodicals archive ?
However, this pair did not rank as high as WZ Cas for the fact that the red star is actually a Mira-type variable, pulsating with a much greater amplitude than WZ Cas and fading to as faint as 12th magnitude at minimum.