Title: melanism Long Title: IUPAC Gold Book - melanism DOI: 10.1351/goldbook.14844 Status: current Definition Increased black or nearly black pigmentation of skin, feathers, or hair of an organism, resulting from (increased) synthesis of melanin. Related Term - industrial melanism: https://goldbook.iupac.org//terms/view/14763 Source - PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 913 (https://doi.org/10.1351/PAC-REC-08-07-09) Other Outputs - html: https://goldbook.iupac.org/terms/view/14844/html - json: https://goldbook.iupac.org/terms/view/14844/json - xml: https://goldbook.iupac.org/terms/view/14844/xml Citation: Citation: 'melanism' 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.14844 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: 2026-06-12T21:56:42+00:00