1. auroral -- (of or relating to the atmospheric phenomenon auroras; "a prominent green line in the spectrum of the auroras is called the `auroral line'")
2. auroral, aurorean -- (characteristic of the dawn; "a dim auroral glow")
1.
O fair auroral skies--O morning dew upon the gras. - from Leaves of Grass by Walt Whitman
2.
Cosette was a condensation of the auroral light in the form of a woman. - from Les Miserables by Victor Hugo