GLACIAL

adjective Etymology: Latin ~is, from glacies Date: 1656 suggestive of ice: as, extremely cold ; frigid , devoid of warmth and cordiality , coldly imperturbable , of a purity marked by the tendency to readily solidify in the form of ice-like crystals , 3. a. of, relating to, or being any of those parts of geologic time from Precambrian onward when a much larger portion of the earth was covered by glaciers than at present, Pleistocene , of, relating to, or produced by glaciers, suggestive of the very slow movement of glaciers , ~ly adverb