auroral
- a of or relating to the atmospheric phenomenon auroras
a prominent green line in the spectrum of the auroras is called the `auroral line' - a characteristic of the dawn
a dim auroral glow
auspicious
- a auguring favorable circumstances and good luck
an auspicious beginning for the campaign
austere
- s severely simple
- s of a stern or strict bearing or demeanor; forbidding in aspect
an austere expression - s practicing great self-denial
a desert nomad's austere life
austral
- n the basic unit of money in Argentina; equal to 100 centavos
- s of the south or coming from the south
sailed the austral seas