1A small southern constellation (the Southern Triangle), lying in the Milky Way near the south celestial pole.

1. 1.1as genitive Trianguli Australis /trīˈaNGɡyəlē ôˈstrālis, trīˈaNGɡyəˌlī/ Used with preceding letter or numeral to designate a star in the constellation Triangulum Australe.
   与其前面的字母或数字连用以标记该星座中的星南三角星座的
   the star Alpha Trianguli Australis

   南三角座α星。