W Virginis stars
W Virginis stars(ver -ji-niss) See Cepheid variables.
W Virginis stars[¦dəb·əl·yü vər′jin·əs ‚stärz]
Periodic variable stars with periods of about 10 to 30 days; they exhibit two surges of activity from the same star so that there is a doubling of their spectral lines. Also known as Type II Cepheids.