Title: multiphoton process Long Title: IUPAC Gold Book - multiphoton process DOI: 10.1351/goldbook.M04054 Status: current Definition A process involving interaction of two or more photons with a molecular entity. Related Terms - biphotonic process: https://goldbook.iupac.org//terms/view/B00669 - two-photon process: https://goldbook.iupac.org//terms/view/T06542 Source - PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2255 (https://doi.org/10.1351/pac199668122223) Other Outputs - html: https://goldbook.iupac.org/terms/view/M04054/html - json: https://goldbook.iupac.org/terms/view/M04054/json - xml: https://goldbook.iupac.org/terms/view/M04054/xml Citation: Citation: 'multiphoton process' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.M04054 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. Accessed: 2026-05-08T02:02:35+00:00