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The Collaborative International Dictionary
Austral signs

Austral \Aus"tral\, a. [L. australis, fr. auster: cf. F. austral.]

  1. Southern; lying or being in the south; as, austral land; austral ocean.

  2. (Biogeography) Designating, or pertaining to, a zone extending across North America between the Transition and Tropical zones, and including most of the United States and central Mexico except the mountainous parts.

    Austral signs (Astron.), the last six signs of the zodiac, or those south of the equator.