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(zn), n.[F. zone, L. zona, Gr. zw°nh; akin to zwnny°nai to gird, Lith. jsta a girdle, jsti to gird, Zend yh.] 1. A girdle; a cincture. [Poetic] An embroidered zone surrounds her waist. Dryden. Loose were her tresses seen, her zone unbound. Collins. 2. (Geog.) One of the five great divisions of the earth, with respect to latitude and temperature. The zones are five: the torrid zone, extending from tropic to tropic 46 56", or 23 28" on each side of the equator; two temperate or variable zones, situated between the tropics and the polar circles; and two frigid zones, situated between the polar circles and the poles. Commerce . . . defies every wind, outrides every tempest, and invades. Bancroft. 3. (Math.) The portion of the surface of a sphere included between two parallel planes; the portion of a surface of revolution included between two planes perpendicular to the axis. Davies & Peck (Math. Dict.) 4. (Nat. Hist.) (a) A band or stripe extending around a body. (b) A band or Zone v. t.To girdle; to encircle. [R.] Keats. Zone n. 1. (Biogeography) An area or part of a region characterized by uniform or similar animal and plant life; a life zone; as, Littoral zone, Austral zone, etc. The zones, or life zones, commonly recognized for North America are Arctic, Hudsonian, Canadian, Transition, Upper Austral, Lower Austral, and Tropical. 2. (Cryst.) A series of faces whose intersection lines with each other are parallel. 3. (Railroad Econ.) (a) The aggregate of stations, in whatsoever direction or on whatsoever line of railroad, situated between certain maximum and minimum limits from a point at which a shipment of traffic originates. (b) Any circular or ring-shaped area within which the street-car companies make no differences of fare. 4. In the United States parcel-post system, any of the areas about any point of shipment for which but one rate of postage is charged for a parcel post shipment from that point. The rate increases from within outwards. The first zone includes the unit of area "(a quadrangle 30 minutes square)" in w スポンサード リンク
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