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polar circle

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noun
  1. either the Arctic or the Antarctic Circle.
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Origin of polar circle

First recorded in 1545–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for polar circle

polar circle

noun
  1. a term for either the Arctic Circle, Antarctic Circle
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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

polar circle in Science

polar circle

  1. The Arctic Circle or the Antarctic Circle.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.