Term: deflection (for a precision balance) https://doi.org/10.1351/goldbook.D01554 Definition: (In terms of divisions of the pointer scale). The other point of reversal of an ideal (undamped) swing starting at the zero point of the pointer scale. Since the points of reversal of an ideal swing are located symmetrically about the rest point, the deflection is equal to twice the rest point. Related Terms: 1) zero point (<em>of a balance</em>) (http://doi.org/10.1351/goldbook.Z06743). 2) rest point (<em>of a balance</em>) (<em>of a balance</em>) (http://doi.org/10.1351/goldbook.R05348). Source: Orange Book, 2nd ed., p. 36 (https://media.iupac.org/publications/analytical_compendium/) Citation: 'deflection (for a precision balance)' 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.D01554 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.