Polar. Pertaining to poles of a sphere; to extremeties of Earth's axis; to points in celestial concave immediately above poles of Earth; to points of no magnetic dip on surface of Earth; to points of maximum force in a magnet.
Polar Air.Cold air; not necessarily of polar or even arctic origin.
Polar Angle. Angle, at pole of Equinoctial, between two hour circles or meridians.
Polar Circles. Arctic and Antarctic circles in latitudes 66° 33' North and South respectively.
Polar Distance. Value, in arc, of that part of hour circle intercepted between elevated pole of celestial sphere and an observed heavenly body.
Polar Front. Line of demarcation that may develop between air from high latitudes and air from low latitudes.
Polaris.The Pole Star, Ursae Minoris. R.A. 01 h 49 m; Dec. 89°; Mag. 2-1. 2. Missile which can be launched under water and aimed at a target 2500 miles distant.
Pole. Of Earth, is extremity of its axis of rotation. Of heavens, is a point 90° from every point in circumference of Equinoctial. Of a great circle, is the extremity of a diameter of the sphere passing perpendicularly through centre of the great circle. 2. That part of a mast between truck and upper eyes of rigging. 3. A pole mast. 4. Long spar used for propulsion, in shallow water, by resting end on bottom and applying power to part above water.
Pole Axe. Weapon formerly used when boarding enemy ship. Later called 'tomahawk'.