Definition of Triangulum Australe in English:

Triangulum Australe

proper noun

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

    1. 1.1Used with preceding letter or numeral to designate a star in this constellation.
      ‘the star Alpha Trianguli Australis’

Origin

Latin.

Pronunciation:

Triangulum Australe

/ɒˈstrɑːli/