| electromagnetic induction | Electromagnetic waves propagated by induction in an electromagnetic field. (05 Mar 2000) |
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| electromagnetic | <physics> Of, Pertaining to, or produced by, magnetism which is developed by the passage of an electric current. Electromagnetic engine, an engine in which the motive force is electromagnetism. Electromagnetic theory of light, a theory of light which makes it consist in the rapid alternation of transient electric currents moving transversely to the direction of the ray. (03 Mar 1998) |
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| electromagnetic coupling | <physics> A means of extracting energy from a magnetically confined plasma, where the plasma expands and pushes on the confining magnetic field, causing electrical energy to be generated in the external field-generating circuits. (09 Oct 1997) |
| electromagnetic fields | Fields representing the joint interplay of electric and magnetic forces. (12 Dec 1998) |
| electromagnetic flowmeter | A flowmeter in which a magnetic field is applied to a blood vessel to measure flow in terms of the voltage developed by the blood as a conductor moving through the magnetic field. (05 Mar 2000) |
| electromagnetic force | <physics> One of the fundamental forces of interaction which influences charged entities. In quantum field theory, the electromagnetic force is mediated by particles of exchange called (virtual) photons. Photons are massless and travel at the speed of light c. The electromagnetic force obeys an inverse square law, which makes sense because it is mediated by particles that have an infinite lifetime (special-relativistically, time stops in a frame moving at c when observed from a non-moving frame). (05 Jan 1998) |
| electromagnetic lens | <apparatus> An electromagnet designed to produce a suitably shaped magnetic field for the focusing and deflection of electrons or other charged particles in electron optical instruments (cf. Electrostatic lens.) See: microscope, electron. (05 Aug 1998) |
| electromagnetic radiation | <physics> Radiation (such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays) which consists of associated, interacting electric and magnetic field waves which travel at the speed of light. All forms of electromagnetic radiation can be transmitted through vacuum. Electromagnetic waves in plasmas are generally more complex in their behaviour, depending on their frequency. (09 Oct 1997) |
| electromagnetic unit | The unit in an absolute system (CGS) of unit's utilizing the magnetic effects of current; e.g., abampere, abfarad, abhenry, abohm, abvolt. (05 Mar 2000) |
| electromagnetic wave | <physics> A wave of electric and magnetic fields that can move through space. Particles which make up the waves are called photons. (09 Oct 1997) |
| genetic induction | The triggering of a specific gene by an inducer molecule (which acts directly or indirectly by affecting an RNA polymerase molecule). (09 Oct 1997) |
| remission induction | The initial course of treatment given to patients on admission to hospital to remove all clinically detectable cancer. (13 Nov 1997) |
| remission induction chemotherapy | The initial chemotherapy a patient receives to bring about a remission. (12 Dec 1998) |
| homeogenetic induction | The induction of an undifferentiated (general, all-purpose) cell to differentiate (become specialised) by a nearby cell which has already differentiated. This is most often observed in plant cells. (09 Oct 1997) |
| spinal induction | The manner in which one sensory stimulus lowers the threshold for another. (05 Mar 2000) |
| neural induction | In vertebrates the formation of the nervous system from the ectoderm of the early embryo as a result of a signal from the underlying mesoderm of the archenteron roof, also called primary neural induction. The mechanism of neural induction is not yet clear. (18 Nov 1997) |