Any period of time during which glaciers covered a large part of the earth's surface.

synonyms: glacial period, ice age.

Dutch: ijstijd
Polish: glacjał, okres glacjalny

From two million to 11 thousand years ago; extensive glaciation of the northern hemisphere; the time of human evolution.

synonyms: Pleistocene, Pleistocene epoch.

Dutch: Pleistoceen
Polish: dyluwium, plejstocen, epoka lodowcowa, epoka lodowa