around or near a pole, as of the earth.

1680–90; circum- + polar Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
circumpolar (ˌsɜːkəmˈpəʊlə)
1.  (of a star or constellation) visible above the horizon at all times at a specified locality on the earth's surface
2.  surrounding or located at or near either of the earth's poles

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1680s in astronomy; 1690s in geology, from circum- + polar.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
circumpolar   (sûr'kəm-pō'lər)  Pronunciation Key 
  1. Located or found in one of Earth's polar regions.

  2. Denoting a star that from a given observer's latitude does not go below the horizon during its diurnal motion. The closer an observer is to one of the poles, the greater the portion of the sky that contains circumpolar stars. At the pole itself, all stars are circumpolar.

The American Heritage® Science Dictionary
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