antares

from WordNet (r) 3.0 (2006)

Antares
    n 1: the brightest star in Scorpius

from The Collaborative International Dictionary of English v.0.48

Antares \An*ta"res\, n. [Gr. ?; ? similar to + ? Mars. It was
   thought to resemble Mars in color.]
   The principal star in Scorpio: -- called also the {Scorpion's
   Heart}.
   [1913 Webster] antiarthritic