GLACIAL

[adjective] [not gradable]glacial deposits (= left by a glacier)a glacial valley (= made by a glacier)Glacial can also mean extremely cold. glacial temperaturesa glacial wind(figurative) She gave me a glacial (= unfriendly) look/smile/stare.A glacial period (also ice age) is a time in the past when the temperature was very cold and glaciers spread over large parts of the Earth.