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Electro-biology :: Electro-biology (n.) That phase of mesmerism or animal magnetism, the phenomena of which are supposed to be produced by a form of electricity..

Needle :: Needle (n.) See Magnetic needle, under Magnetic..

Thermomagnetism :: Thermomagnetism (n.) Magnetism as affected or caused by the action of heat; the relation of heat to magnetism.

Retentivity :: Retentivity (n.) The power of retaining; retentive force; as, the retentivity of a magnet..

Mechanico-chemical :: Mechanico-chemical (a.) Pertaining to, connected with, or dependent upon, both mechanics and chemistry; -- said especially of those sciences which treat of such phenomena as seem to depend on the laws both of mechanics and chemistry, as electricity and magnetism..

Magnetism :: Magnetism (n.) The property, quality, or state, of being magnetic; the manifestation of the force in nature which is seen in a magnet..

Bobbin :: Bobbin (n.) A cylindrical or spool-shaped coil or insulated wire, usually containing a core of soft iron which becomes magnetic when the wire is traversed by an electrical current..

Terrel :: Terrel (n.) A spherical magnet so placed that its poles, equator, etc., correspond to those of the earth..

Diamagnetic :: Diamagnetic (n.) Any substance, as bismuth, glass, phosphorous, etc., which in a field of magnetic force is differently affected from the ordinary magnetic bodies, as iron; that is, which tends to take a position at right angles to the lines of magnetic force, and is repelled by either pole of the magnet..

Electro-magnet :: Electro-magnet (n.) A mass, usually of soft iron, but sometimes of some other magnetic metal, as nickel or cobalt, rendered temporarily magnetic by being placed within a coil of wire through which a current of electricity is passing. The metal is generally in the form of a bar, either straight, or bent into the shape of a horseshoe..

Emery :: Emery (n.) Corundum in the form of grains or powder, used in the arts for grinding and polishing hard substances. Native emery is mixed with more or less magnetic iron. See the Note under Corundum..

Magnet :: Magnet (n.) The loadstone; a species of iron ore (the ferrosoferric or magnetic ore, Fe3O4) which has the property of attracting iron and some of its ores, and, when freely suspended, of pointing to the poles; -- called also natural magnet..

Mesmerism :: Mesmerism (n.) The art of inducing an extraordinary or abnormal state of the nervous system, in which the actor claims to control the actions, and communicate directly with the mind, of the recipient. See Animal magnetism, under Magnetism..

Hysteresis :: Hysteresis (n.) A lagging or retardation of the effect, when the forces acting upon a body are changed, as if from velocity or internal friction; a temporary resistance to change from a condition previously induced, observed in magnetism, thermoelectricity, etc., on reversal of polarity..

Electro- :: Electro- () A prefix or combining form signifying pertaining to electricity, produced by electricity, producing or employing electricity, etc.; as, electro-negative; electro-dynamic; electro-magnet..

Magnetical :: Magnetical (a.) Pertaining to the magnet; possessing the properties of the magnet, or corresponding properties; as, a magnetic bar of iron; a magnetic needle..

Demagnetize :: Demagnetize (v. t.) To deprive of magnetic properties. See Magnetize.

Armature :: Armature (n.) A piece of soft iron used to connect the two poles of a magnet, or electro-magnet, in order to complete the circuit, or to receive and apply the magnetic force. In the ordinary horseshoe magnet, it serves to prevent the dissipation of the magnetic force..

Physiography :: Physiography (n.) The science which treats of the earth's exterior physical features, climate, life, etc., and of the physical movements or changes on the earth's surface, as the currents of the atmosphere and ocean, the secular variations in heat, moisture, magnetism, etc.; physical geography..

Paramagnetic :: Paramagnetic (n.) A paramagnetic substance.

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