1A large constellation (the Scorpion). It contains the red giant Antares.

1. 1.1as genitive Scorpii /ˈskôrpēˌī, -ˌē/ Used with preceding letter or numeral to designate a star in the constellation Scorpius.
   与其前面的字母或数字连用以标记该星座中的星天蝎（星）座的
   the star Theta Scorpii

   天蝎座θ星。