from the GNU version of the Collaborative International Dictionary of English
- adj. a period during which the climate of the modern temperate regions was polar, and ice covered large portions of the northern hemisphere to the mountain tops.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. from two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution
- n. any period of time during which glaciers covered a large part of the earth's surface
Sorry, no etymologies found.
When the high excentricity passed away the glacial epoch also passed away in the Temperate zone; but it persists in the Arctic zone, where during the Miocene there were mild climates, and this is due to the persistence of the changed geographical conditions.