#Frigid_Zone__polar_zone__polarzone  the part of the Earth's surface forming a cap over a pole; characterized by frigid climate
  supertype:  #climatic_zone  any of the geographical zones loosely divided according to prevailing climate and latitude
  subtype:  #Antarctic_Zone__Antarctic__South_Frigid_Zone  the region around the south pole: Antarctica and surrounding waters
  subtype:  #Arctic_Zone__Arctic__North_Frigid_Zone  the regions north of the Arctic Circle centered on the North Pole

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