Glacial is an adjective that describes something related to or resembling a glacier, which is a huge body of ice found in polar regions. Synonyms for glacial include frosty, frozen, icy, arctic, wintry, frigid, and polar. The term glacial is also used to describe something slow-moving, sluggish, or unemotional, akin to the pace of a glacier. In this sense, synonyms for glacial are aloof, cold, distant, indifferent, reserved, and unresponsive. Glacial is also used in the context of geological periods, referring to a time period that saw the growth and retreat of glaciers. Synonyms for glacials in this sense include ice ages, glacial epochs, and cold snaps.