ionization

noun
ion·​i·​za·​tion | \ ˌī-ə-nə-ˈzā-shən How to pronounce ionization (audio) \
plural ionizations

Definition of ionization

1 : the act or process of ionizing something : conversion of a substance into ions Then other photons, collisions or an electric field cause ionization of the excited neutral species.— G. Samuel Hurst and Vladilen S. Letokhov
2 : the state of being ionized While the light flashes themselves are not harmful, the tissue ionization caused by the intruding particle near the end of its track is indeed deadly to some affected cells.— James D. Burke

First Known Use of ionization

1891, in the meaning defined at sense 1

History and Etymology for ionization

ion + -ization

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The first known use of ionization was in 1891

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