polar

Short definition from Wiktionary

Adjective

1. 1
   Of or having a pole or polarity, as: Of, relating to, measured from, or referred to a geographic pole (the North Pole or South Pole); within the Arctic or Antarctic circles.
2. 2
   Of or having a pole or polarity, as: Of an orbit that passes over, or near, one of these poles.
3. 3
   Of or having a pole or polarity, as: Having a dipole; ionic.
4. 4
   Of or having a pole or polarity, as: Of a coordinate system, specifying the location of a point in a plane by using a radius and an angle.
5. 5
   Of or having a pole or polarity, as: Having but two possible answers, yes and no.
6. 6
   Of or having a pole or polarity, as: Of or relating to a pole (extreme) on any spectrum or field, such as an ideologically pure dogmatic position as opposed to any syncretic integration or balancing of competing principles.

Noun

1. 1
   The line joining the points of contact of tangents drawn to meet a curve from a point called the pole of the line.