aurora australis

n., pl., aurora aus·tra·lis·es (-lĭ-sĭz), or aurorae australis.
An aurora that occurs in southern regions of the earth. Also called southern lights.

[New Latin aurōra austrālis : Latin aurōra, dawn + Latin austrālis, southern.]

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The noun has one meaning:

Meaning #1: the aurora of the southern hemisphere
  Synonym: southern lights

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