D defs.my
Entry 2 senses Webster, 1913

Austral

/ôs'-trəl/ · Aus·tral · IPA /ˈɒstɹəl/
01 a. Southern; lying or being in the south; as, austral land; austral ocean.
  1. 1.
    Southern; lying or being in the south; as, austral land; austral ocean.
  2. 2.
    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.(Biogeography)
Phrases & compounds
Austral signs — the last six signs of the zodiac, or those south of the equator.