circumpolar

[sur-kuh m-poh-ler]

Origin of circumpolar

First recorded in 1680–90; circum- + polar
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for circumpolar

Historical Examples of circumpolar


British Dictionary definitions for circumpolar

circumpolar

adjective
  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 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for circumpolar
adj.

1680s in astronomy; 1690s in geography, from circum- + polar.

Online Etymology Dictionary, © 2010 Douglas Harper

circumpolar in Science

circumpolar

[sûr′kəm-pōlər]
  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 Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.