photoionization

noun
pho·​to·​ion·​i·​za·​tion | \ˌfō-tō-ˌī-ə-nə-ˈzā-shən \

Definition of photoionization 

: ionization (as in the ionosphere) of a molecule or atom caused by absorption of radiant energy

Other Words from photoionization

photoionize \ ˌfō-​tō-​ˈī-​ə-​ˌnīz \ transitive verb

First Known Use of photoionization

1914, in the meaning defined above

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The first known use of photoionization was in 1914

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