World English Dictionary
ionization or ionisation (ˌaɪənaɪˈzeɪʃən)
a.  the formation of ions as a result of a chemical reaction, high temperature, electrical discharge, particle collisions, or radiation
 b.  (as modifier): ionization temperature; ionization current
ionisation or ionisation

Collins English Dictionary - Complete & Unabridged 10th Edition
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1. the condition of being dissociated into ions (as by heat or radiation or chemical reaction or electrical discharge); "the ionization of a gas" [syn: ionization
2. 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 [syn: ionization
WordNet® 3.0, © 2006 by Princeton University.
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