Term: perturbed dimensions https://doi.org/10.1351/goldbook.P04518 Definition: The dimensions of an actual polymer random coil not in a theta state. Related Terms: 1) random coil (in polymers) (http://doi.org/10.1351/goldbook.R05124). 2) theta state (in polymers) (in polymers) (http://doi.org/10.1351/goldbook.Q06240). Source: Purple Book, 1st ed., p. 48 (http://old.iupac.org/publications/books/author/metanomski.html) Citation: 'perturbed dimensions' 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.P04518 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.