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|Noun||1.||glacial epoch - 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"|
geological period, period - a unit of geological time during which a system of rocks formed; "ganoid fishes swarmed during the earlier geological periods"
|2.||Glacial epoch - from two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.