Title: monomeric unit
Long Title: IUPAC Gold Book - monomeric unit
DOI: 10.1351/goldbook.M04018
Status: current

Definition
The largest constitutional unit contributed by a single monomer molecule to the structure of a macromolecule or oligomer molecule.

Note
The largest constitutional unit contributed by a single monomer molecule to the structure of a macromolecule or oligomer molecule may be described as either monomeric, or by monomer used adjectivally.

Related Terms
- constitutional unit: https://goldbook.iupac.org//terms/view/C01288
- macromolecule: https://goldbook.iupac.org//terms/view/M03667
- monomer: https://goldbook.iupac.org//terms/view/M04017
- monomer molecule: https://goldbook.iupac.org//terms/view/M04019
- oligomer molecule: https://goldbook.iupac.org//terms/view/O04286

Source
- PAC, 1996, 68, 2287. 'Glossary of basic terms in polymer science (IUPAC Recommendations 1996)' on page 2290 (https://doi.org/10.1351/pac199668122287)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/M04018/html
- json: https://goldbook.iupac.org/terms/view/M04018/json
- xml: https://goldbook.iupac.org/terms/view/M04018/xml

Citation: Citation: 'monomeric unit' 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.M04018
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.
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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: 2026-04-20T19:26:18+00:00