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glacial epoch

noun
1.
Also called glacial period, ice age. the geologically recent Pleistocene Epoch, during which much of the Northern Hemisphere was covered by great ice sheets.
2.
any one of the Permian, Carboniferous, Cambrian, or Precambrian glaciations.
Origin
1840-1850
1840-50
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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