Term: dual-mode photochromism https://doi.org/10.1351/goldbook.DT07366 Definition: photochromism occurring in complex systems and triggered alternatively by two different external stimuli, such as light and an electric current. In such a case photochromism and 'electrochromism' are mutually regulated. Related Terms: 1) photochromism (http://doi.org/10.1351/goldbook.P04589). 2) electric current (http://doi.org/10.1351/goldbook.E01927). Source: PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 327 (https://doi.org/10.1351/pac200779030293) Citation: 'dual-mode photochromism' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.DT07366 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. 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.