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:
1840–50

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
glacial epoch

noun
1. any period of time during which glaciers covered a large part of the earth's surface; "the most recent ice age was during the Pleistocene" [syn: ice age
2. from two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution [syn: Pleistocene
WordNet® 3.0, © 2006 by Princeton University.
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Example sentences
Then he had entered gaily the door of the glacial epoch, and had surveyed a
  universe of unities and uniformities.
During the glacial epoch this was part of a migration route for people,
  animals, and plants.
At the end of the last glacial epoch, sea level rose relatively rapidly as
  continental glaciers melted.
The extent of these glaciers during the glacial epoch has not been determined.
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