Southern Triangle
/ˌsʌðn ˈtrʌɪaŋɡl/ /ˌsʌðn ˈtrʌɪəŋɡl/Astronomy
noun
The constellation Triangulum Australe.
Origin
Late 16th century; earliest use found in Thomas Blundeville (fl. 1561), author and translator. From southern + triangle, after post-classical Latin Triangulum australe.