The Collaborative International Dictionary of English. 2000.
glacious — adjective Characteristic, composed, or of the nature of icy; icy.<ref name= OED /><ref name= WRUD >“Gla<tt> </tt>cious” listed in Webster’s Revised Unabridged Dictionary, © 1996, 1998</ref> … Wiktionary
glacious — … Useful english dictionary