(often initial capital letters) the glacial epoch, especially the Pleistocene Epoch.
Origin of ice age
First recorded in 1870–75
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Any of several cold periods during which glaciers covered much of the Earth.
Ice Age. The most recent glacial period, which occurred during the Pleistocene Epoch and ended about 10,000 years ago. During the Pleistocene Ice Age, great sheets of ice up to two miles thick covered most of Greenland, Canada, and the northern United States as well as northern Europe and Russia.
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The last ice age ended less than twenty thousand years ago.
Scientists believe that there will be more ice ages in the future, caused by tiny changes in the Earth's orbit and rotation.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.