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Adjective glacial has 3 senses
glacial - relating to or derived from a glacier; "glacial deposit"
 frigid, frosty, frozen, glacial, icy, wintry - devoid of warmth and cordiality; expressive of unfriendliness or disdain; "a frigid greeting"; "got a frosty reception"; "a frozen look on their faces"; "a glacial handshake"; "icy stare"; "wintry smile"Antonym:  hot (indirect, via cold)
 
arctic, frigid, gelid, glacial, icy, polar - extremely cold; "an arctic climate"; "a frigid day"; "gelid waters of the North Atlantic"; "glacial winds"; "icy hands"; "polar weather"Antonym:  hot (indirect, via cold)
 
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