pho·​to·​ion·​i·​za·​tion | \ ˌfō-tō-ˌī-ə-nə-ˈzā-shən How to pronounce photoionization (audio) \

Definition of photoionization

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

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Other Words from photoionization

photoionize \ ˌfō-​tō-​ˈī-​ə-​ˌnīz How to pronounce photoionization (audio) \ transitive verb

Examples of photoionization in a Sentence

Recent Examples on the Web The breathing zone will be monitored with a photoionization detector to screen for volatile organic compounds (in the work zone). al, 14 Jan. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'photoionization.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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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Cite this Entry

“Photoionization.” Dictionary, Merriam-Webster, Accessed 27 Oct. 2021.

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