An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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shell star
  ستاره‌ی ِ پوسته‌دار  
setâre-ye pustedâr
Fr.: étoile à enveloppe  

A main-sequence star, usually of spectral class B to F, whose spectrum shows bright emission lines superimposed on the normal absorption lines. The emission spectrum is explained by the presence of a circumstellar shell of gas surrounding the star at the equator.
Shell stars are fast rotators.

See also: → shell; → star.