number-distribution function 

https://doi.org/10.1351/goldbook.N04263
A distribution function in which the relative amount of a portion of a substance with a specific value, or a range of values, of the random variable(s) is expressed in terms of mole fraction.
Source:
Purple Book, 1st ed., p. 56 [Terms] [Book]
Citation: 'number-distribution function' 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.N04263 RIS BibTex EndNote
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Last revised: February 24, 2014