Meteorology. the variable frontal zone of middle latitudes separating air masses of polar and tropical origin.
(meteorol) a front dividing cold polar air from warmer temperate or tropical air
The region or boundary separating air masses of polar origin from those of tropical or subtropical origin. The position of the polar front during winter in a particular hemisphere is at approximately 30° latitude, while in the summer it is at approximately 60° latitude. The convergence of warm and cool air masses along the polar front often produces cyclonic wind systems.
[puh-lahr-ee, paw-] /pəˈlɑr i, pɔ-/ noun 1. a distinctive English argot in use since at least the 18th century among groups of theatrical and circus performers and in certain homosexual communities, derived largely from Italian, directly or through Lingua Franca. /pəˈlɑːrɪ/ noun 1. an English slang that is derived from the Lingua Franca of Mediterranean […]
[poh-luh-rim-i-ter] /ˌpoʊ ləˈrɪm ɪ tər/ noun, Optics. 1. an instrument for measuring the amount of light received from a given source as a function of its state of polarization. 2. a form of polariscope for measuring the angular rotation of the plane of polarization. /ˌpəʊləˈrɪmɪtə/ noun 1. an instrument for measuring the amount of polarization […]
[poh-lair-is, -lar-, puh-] /poʊˈlɛər ɪs, -ˈlær-, pə-/ noun 1. Astronomy. the polestar or North Star, a star of the second magnitude situated close to the north pole of the heavens, in the constellation Ursa Minor: the outermost star in the handle of the Little Dipper. 2. a two-stage U.S. ballistic missile, usually fired from a […]
n. chiefly British English spelling of polarization. For spelling, see -ize.