The mass 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.
Source: PAC, 1979, 51, 2451. (Quantities and Units in Clinical Chemistry) on page 2474 [Terms] [Paper]
Cite as: IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). Online version (2019-) created by S. J. Chalk. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook.