
The British Antarctic Territory (BAT) is a sector of Antarctica claimed by the United Kingdom as one of its 14 British Overseas Territories and is the largest. It comprises the region south of 60°S latitude and between longitudes 20°W and 80°W, forming a wedge shape that extends to the South Pole, overlapping the Antarctic claims of Argentina (...
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http://en.wikipedia.org/wiki/British_Antarctic_Territory

a territory of the United Kingdom lying southeast of South America, extending from the Atlantic Ocean on the east to the Pacific Ocean on the west. ... [3 related articles]
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http://www.britannica.com/eb/a-z/b/114

a British colony in the S Atlantic, comprising the South Shetland Islands, the South Orkney Islands, and Graham Land: formerly dependencies of the Falkland Islands.
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https://www.infoplease.com/dictionary/british-antarctic-territory
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