auroral

from WordNet (r) 3.0 (2006)

auroral
    adj 1: of or relating to the atmospheric phenomenon auroras; "a
           prominent green line in the spectrum of the auroras is
           called the `auroral line'"
    2: characteristic of the dawn; "a dim auroral glow" [syn:
       {auroral}, {aurorean}]

from The Collaborative International Dictionary of English v.0.48

Auroral \Au*ro"ral\, a.
   Belonging to, or resembling, the aurora (the dawn or the
   northern lights); rosy.
   [1913 Webster]

         Her cheeks suffused with an auroral blush.
                                                  --Longfellow.
   [1913 Webster]

[email protected]