| ion | (noun) a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons | - |
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| ionisation | (noun) the process of ionizing; the formation of ions by separating atoms or molecules or radicals or by adding or subtracting electrons from atoms by strong electric fields in a gas | Synonyms: ionization |
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| (noun) the condition of being dissociated into ions (as by heat or radiation or chemical reaction or electrical discharge) | Synonyms: ionization |
| ionization | (noun) the process of ionizing; the formation of ions by separating atoms or molecules or radicals or by adding or subtracting electrons from atoms by strong electric fields in a gas | Synonyms: ionisation |
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| (noun) the condition of being dissociated into ions (as by heat or radiation or chemical reaction or electrical discharge) | Synonyms: ionisation |
| ionophoresis | (noun) the motion of charged particles in a colloid under the influence of an electric field; particles with a positive charge go to the cathode and negative to the anode | Synonyms: cataphoresis, dielectrolysis, electrophoresis |
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| ionosphere | (noun) the outer region of the Earth's atmosphere; contains a high concentration of free electrons | - |
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| iontophoresis | (noun) therapy that uses a local electric current to introduce the ions of a medicine into the tissues | Synonyms: electromotive drug administration, EMDA, ionic medication, iontotherapy |
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| iontotherapy | (noun) therapy that uses a local electric current to introduce the ions of a medicine into the tissues | Synonyms: electromotive drug administration, EMDA, ionic medication, iontophoresis |
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