glacial epoch is a noun meaning "any period of time during which glaciers covered a large part of the earth's surface". It carries 2 recorded senses.
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”
from two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution
Definitions, synonyms and semantic relations for glacial epoch come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.