Source : Webster's Revised Unabridged Dictionary (1913)

Circumpolar \Cir`cum*po"lar\, a. [Pref. circum- + polar.]
   About the pole; -- applied to stars that revolve around the
   pole without setting; as, circumpolar stars.

Source : WordNet®

circumpolar
     adj 1: (of a celestial body) continually visible above the horizon
            during the entire 360 degrees of daily travel; "a
            circumpolar star"
     2: located or found throughout a polar region