Polar
['pəʊlə] or ['polɚ]
Definition
(adj.) having a pair of equal and opposite charges .
(adj.) of or existing at or near a geographical pole or within the Arctic or Antarctic Circles; 'polar regions' .
(adj.) located at or near or coming from the earth's poles; 'polar diameter'; 'polar zone'; 'a polar air mass'; 'Antarctica is the only polar continent' .
Typist: Oliver--From WordNet
Definition
(a.) Of or pertaining to one of the poles of the earth, or of a sphere; situated near, or proceeding from, one of the poles; as, polar regions; polar seas; polar winds.
(a.) Of or pertaining to the magnetic pole, or to the point to which the magnetic needle is directed.
(a.) Pertaining to, reckoned from, or having a common radiating point; as, polar coordinates.
(n.) The right line drawn through the two points of contact of the two tangents drawn from a given point to a given conic section. The given point is called the pole of the line. If the given point lies within the curve so that the two tangents become imaginary, there is still a real polar line which does not meet the curve, but which possesses other properties of the polar. Thus the focus and directrix are pole and polar. There are also poles and polar curves to curves of higher degree than the second, and poles and polar planes to surfaces of the second degree.
Inputed by Huntington
Definition
adj. pertaining to or situated near either of the poles: pertaining to the magnetic poles: having a common meeting-point.—n. (geom.) the line joining the points of contact of tangents drawn to meet a curve from a point called the pole of the line.—ns.pl. Pōlar-co-or′dinates co-ordinates defining a point by means of a radius vector and the angle which it makes with a fixed line through the origin; Pō′lar-for′ces forces that act in pairs and in different directions as in magnetism.—n. Polarim′eter the polariscope.—adj. Polarī′sable capable of polarisation.—ns. Polarisā′tion (opt.) a particular modification of rays of light by the action of certain media or surfaces so that they cannot be reflected or refracted again in certain directions: state of having polarity; Polar′iscope an instrument for polarising light and analysing its properties.—v.t. Pō′larise to give polarity to.—ns. Pō′lariser that which polarises or gives polarity to; Polar′ity state of having two opposite poles: a condition in certain bodies according to which their properties arrange themselves so as to have opposite powers in opposite directions as in a magnet with its two poles.—Polar bear a large white bear found in the Arctic regions; Polar circle a parallel of latitude encircling each of the poles at a distance of 23?28′ from the pole—the north polar being called the arctic the south the antarctic circle; Polar lights the aurora borealis or australis.
Inputed by Gavin
Examples
- Come, Steerforth, let's explore the polar regions, and have it over. Charles Dickens. David Copperfield.
- I am steady as a rock, fixed as the polar star. Charlotte Bronte. Shirley.
- Half a million years ahead it may be a winterless world with trees and vegetation even in the polar circles. H. G. Wells. The Outline of History_Being a Plain History of Life and Mankind.
- Add to these, instances in which heat seems to be absent, as moon's rays, sun's rays on mountains, obli que rays in the polar circle. Walter Libby. An Introduction to the History of Science.
- We were above the south polar ice cap. Edgar Rice Burroughs. The Gods of Mars.
- The African explorer and the Polar adventurer can each talk with his countrymen. Rupert S. Holland. Historic Inventions.
- Watson has remarked, in receding from polar toward equatorial latitudes, the Alpine or mountain flora really become less and less Arctic. Charles Darwin. On the Origin of Species by Means of Natural Selection.
- Fine time for them as is well wropped up, as the Polar bear said to himself, ven he was practising his skating,' replied Mr. Weller. Charles Dickens. The Pickwick Papers.
- In this way the polar diameter, or diameter from pole to pole, is shorter than the diameter at right angles to this--the equatorial diameter. Various. The Wonder Book of Knowledge.
- With this idea clearly in mind, the theory of the polarized relay, generally called polar relay, as presented in the diagram (Fig. 7), will be readily understood. Frank Lewis Dyer. Edison, His Life and Inventions.
- Thus far we have referred to two systems, one the neutral or differential duplex, and the other the combination of the neutral and polar relays, making a diplex system. Frank Lewis Dyer. Edison, His Life and Inventions.
- The general principles of quadruplex telegraphy are based upon the phenomena which we have briefly outlined in connection with the neutral relay and the polar relay. Frank Lewis Dyer. Edison, His Life and Inventions.
- The most accurate measurements make the polar diameter about twenty-seven miles less than the equatorial, the equatorial diameter being found to be 7,925. Various. The Wonder Book of Knowledge.
- Almost midway between the hopper and the bin is placed an electromagnet whose polar extension is so arranged as to be a little to one side of a stream of material falling from the hopper. Frank Lewis Dyer. Edison, His Life and Inventions.
Inputed by Amanda