polar

adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about polar at Wordnik → Where our words come from →

1. Having a pair of equal and opposite charges.
2. Characterized by opposite extremes; completely opposed.

   in diametric contradiction to his claims

3. Located at or near or coming from the earth's poles.

   polar diameter