1. [ noun ] (geology) any period of time during which glaciers covered a large part of the earth's surface
Synonyms: glacial_period ice_age

"the most recent ice age was during the Pleistocene"

Related terms: period prehistory
2. [ noun ] (geology) from two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution
Synonyms: Pleistocene_epoch Pleistocene
Related terms: epoch Quaternary
Similar spelling:   glacial_boulder