Term: mean volume rate, \(\frac{\Delta V}{\Delta t}\) https://doi.org/10.1351/goldbook.M03787 Definition: The volume of a specified component changed in or moved to or from a system divided by the time during which the component was changed or moved. Related Terms: 1) clearance (http://doi.org/10.1351/goldbook.CT01101). Source: PAC, 1979, 51, 2451. 'Quantities and Units in Clinical Chemistry' on page 2474 (https://doi.org/10.1351/pac197951122451) Citation: 'mean volume rate, \(\frac{\Delta V}{\Delta t}\)' 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.M03787 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.