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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Unipolar :: Unipolar (a.) Having but one pole or process; -- applied to those ganglionic nerve cells which have but one radiating process; -- opposed to multipolar.

Levogyrate :: Levogyrate (a.) Turning or twisting the plane of polarization towards the left, as levulose, levotartaric acid, etc..

Depolarized :: Depolarized (imp. & p. p.) of Depolariz.

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..

Dextro- :: Dextro- () having the property of turning the plane of polarized light to the right; as, dextrotartaric acid..

Polar :: 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

Mad :: Mad (superl.) Having impaired polarity; -- applied to a compass needle.

Polaristic :: Polaristic (a.) Pertaining to, or exhibiting, poles; having a polar arrangement or disposition; arising from, or dependent upon, the possession of poles or polar characteristics; as, polaristic antagonism..

Unipolar :: Unipolar (a.) Having, or acting by means of, one pole only..

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

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..

Biaxial :: Biaxial (a.) Having two axes; as, biaxial polarization..

Isochromatic :: Isochromatic (a.) Having the same color; connecting parts having the same color, as lines drawn through certain points in experiments on the chromatic effects of polarized light in crystals..

Lituus :: Lituus (n.) A spiral whose polar equation is r2/ = a; that is, a curve the square of whose radius vector varies inversely as the angle which the radius vector makes with a given line..

Polarity :: Polarity (n.) That quality or condition of a body in virtue of which it exhibits opposite, or contrasted, properties or powers, in opposite, or contrasted, parts or directions; or a condition giving rise to a contrast of properties corresponding to a contrast of positions, as, for example, attraction and repulsion in the opposite parts of a magnet, the dissimilar phenomena corresponding to the different sides of a polarized ray of light, etc..

Astatic :: Astatic (a.) Having little or no tendency to take a fixed or definite position or direction: thus, a suspended magnetic needle, when rendered astatic, loses its polarity, or tendency to point in a given direction..

Polarization :: Polarization (n.) An effect produced upon the plates of a voltaic battery, or the electrodes in an electrolytic cell, by the deposition upon them of the gases liberated by the action of the current. It is chiefly due to the hydrogen, and results in an increase of the resistance, and the setting up of an opposing electro-motive force, both of which tend materially to weaken the current of the battery, or that passing through the cell..

Dextrin :: Dextrin (n.) A translucent, gummy, amorphous substance, nearly tasteless and odorless, used as a substitute for gum, for sizing, etc., and obtained from starch by the action of heat, acids, or diastase. It is of somewhat variable composition, containing several carbohydrates which change easily to their respective varieties of sugar. It is so named from its rotating the plane of polarization to the right; -- called also British gum, Alsace gum, gommelin, leiocome, etc. See Achroodextrin, and Ery

Bibliopolar :: Bibliopolar (a.) Of or pertaining to the sale of books.

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