polar
     adj 1: having a pair of equal and opposite charges
     2: characterized by opposite extremes; completely opposed; "in
        diametric contradiction to his claims"; "diametrical (or
        opposite) points of view"; "opposite meanings"; "extreme
        and indefensible polar positions" [syn: {diametric}, {diametrical},
         {opposite}]
     3: located at or near or coming from the earth's poles; "polar
        diameter"; "polar zone"; "a polar air mass"; "Antarctica
        is the only polar continent"
     4: of or existing at or near a geographical pole or within the
        Arctic or Antarctic Circles; "polar regions" [ant: {equatorial}]
     5: extremely cold; "an arctic climate";  "a frigid day"; "gelid
        waters of the North Atlantic"; "glacial winds"; "icy
        hands"; "polar weather" [syn: {arctic}, {frigid}, {gelid},
         {glacial}, {icy}]
     6: being of crucial importance; "a pivotal event"; "Its pivotal
        location has also exposed it to periodic invasions"- Henry
        Kissinger; "the polar events of this study"; "a polar
        principal" [syn: {pivotal}]
Source: WordNet® 2.0