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Vos·tok(vŏs′tŏk′, və-stŏk′), Lake
A subglacial lake in the eastern part of Antarctica. Its waters, covered by more than 3,600 m (12,000 ft) of ice, are believed to have been isolated from external environmental influences for millions of years.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.