English definition of Polar

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Definition of polar

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Polar (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 th

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Polar :: Polar (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..

Idiophanous :: Idiophanous (a.) Exhibiting interference figures without the aid of a polariscope, as certain crystals..

Polarimetry :: Polarimetry (n.) The art or process of measuring the polarization of light.

Dipolar :: Dipolar (a.) Having two poles, as a magnetic bar..

Differential :: Differential (n.) One of two coils of conducting wire so related to one another or to a magnet or armature common to both, that one coil produces polar action contrary to that of the other..

Electricity :: Electricity (n.) A power in nature, a manifestation of energy, exhibiting itself when in disturbed equilibrium or in activity by a circuit movement, the fact of direction in which involves polarity, or opposition of properties in opposite directions; also, by attraction for many substances, by a law involving attraction between surfaces of unlike polarity, and repulsion between those of like; by exhibiting accumulated polar tension when the circuit is broken; and by producing heat, light, concus

Bipolarity :: Bipolarity (n.) Bipolar quality.

Levorotatory :: Levorotatory (a.) Turning or rotating the plane of polarization towards the left; levogyrate, as levulose, left-handed quartz crystals, etc..

Depolarizer :: Depolarizer (n.) A substance used to prevent polarization, as upon the negative plate of a voltaic battery..

Diamagnet :: Diamagnet (n.) A body having diamagnetic polarity.

Cynosure :: Cynosure (n.) The constellation of the Lesser Bear, to which, as containing the polar star, the eyes of mariners and travelers were often directed..

Polariscopic :: Polariscopic (a.) Of or pertaining to the polariscope; obtained by the use of a polariscope; as, polariscopic observations..

Dextrose :: Dextrose (n.) A sirupy, or white crystalline, variety of sugar, C6H12O6 (so called from turning the plane of polarization to the right), occurring in many ripe fruits. Dextrose and levulose are obtained by the inversion of cane sugar or sucrose, and hence called invert sugar. Dextrose is chiefly obtained by the action of heat and acids on starch, and hence called also starch sugar. It is also formed from starchy food by the action of the amylolytic ferments of saliva and pancreatic juice..

Periscii :: Periscii (n. pl.) Those who live within a polar circle, whose shadows, during some summer days, will move entirely round, falling toward every point of the compass..

Lodestone :: Lodestone (n.) A piece of magnetic iron ore possessing polarity like a magnetic needle. See Magnetite.

Magnetite :: Magnetite (n.) An oxide of iron (Fe3O4) occurring in isometric crystals, also massive, of a black color and metallic luster. It is readily attracted by a magnet and sometimes possesses polarity, being then called loadstone. It is an important iron ore. Called also magnetic iron..

Zinco-polar :: Zinco-polar (a.) Electrically polarized like the surface of the zinc presented to the acid in a battery, which has zincous affinity..

Telepolariscope :: Telepolariscope (n.) A polariscope arranged to be attached to a telescope.

Electro-polar :: Electro-polar (a.) Possessing electrical polarity; positively electrified at one end, or on one surface, and negatively at the other; -- said of a conductor..

Dextrorotatory :: Dextrorotatory (a.) Turning, or causing to turn, toward the right hand; esp., turning the plane of polarization of luminous rays toward the right hand; as, dextrorotatory crystals, sugars, etc. Cf. Levorotatory..