Title: bioactivity Long Title: IUPAC Gold Book - bioactivity DOI: 10.1351/goldbook.13873 Status: current Definition Capability of a substance, such as a drug or a vaccine, to provoke a response from a living matter. Notes 1) There is no polymer (solid or in solution) that is inert in contact with a living system, because of adsorption and/or physical-chemical interactions with life elements (biopolymers, cells, and tissues). 2) Stealth is often used to reflect the absence of recognition by defense proteins of the complement, and more generally opsonins that serve as binding enhancers for the process of phagocytosis. Related Term - Stealth: https://goldbook.iupac.org//terms/view/13945 Source - PAC, 2012, 84, 377. 'Terminology for biorelated polymers and applications (IUPAC Recommendations 2012)' on page 380 (https://doi.org/10.1351/PAC-REC-10-12-04) Other Outputs - html: https://goldbook.iupac.org/terms/view/13873/html - json: https://goldbook.iupac.org/terms/view/13873/json - xml: https://goldbook.iupac.org/terms/view/13873/xml Citation: Citation: 'bioactivity' 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.13873 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: 2026-06-04T19:52:44+00:00