Etymology
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circumpolar (adj.)

"surrounding one of the celestial or terrestrial poles," 1680s in astronomy; 1690s in geography, from circum- "around" + polar.

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Definitions of circumpolar

circumpolar (adj.)
(of a celestial body) continually visible above the horizon during the entire 360 degrees of daily travel;
a circumpolar star
circumpolar (adj.)
located or found throughout a polar region;
From wordnet.princeton.edu