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Named by Dutch explorers Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597. From [[w:Template:lang:la language|Template:lang:la]][[Category:Template:lang:la derivations]] triangulum, a "triangle" + australe, "southern".
- (astronomy) A winter constellation of the southern sky, which has three bright stars that form a triangle. It lies north of the constellation Apus, between Ara and Circinus.
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