Term: regular single-strand polymer https://doi.org/10.1351/goldbook.R05250 Definition: A regular linear polymer that can be described by a preferred constitutional repeating unit in which both terminal constituent subunits are connected through single atoms to the other identical constitutional repeating units or to an end group. Related Terms: 1) linear polymer (http://doi.org/10.1351/goldbook.L03556). 2) constituent (<em>in polymers</em>) (http://doi.org/10.1351/goldbook.C01281). 3) constitutional repeating unit (<em>in polymers</em>) (http://doi.org/10.1351/goldbook.C01286). Source: Purple Book, 1st ed., p. 110 (http://old.iupac.org/publications/books/author/metanomski.html) Citation: 'regular single-strand polymer' 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.R05250 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.