## Wikipedia - Flusso flux, $$J_{\text{X}}$$

of a quantity
https://doi.org/10.1351/goldbook.F02461
Flow rate of X through a cross-section perpendicular to the flow divided by the cross-sectional area.
Sources:
Green Book, 2nd ed., p. 65 [Terms] [Book]
PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 974 [Terms] [Paper]