average rate of flow

in polarography
The ratio of the mass of a drop, at the instant when it is detached from the tip of the capillary, to the drop timet 1; the average value of the instantaneous rate of flow over the entire life of the drop.
Source:
PAC, 1985, 57, 1491 (Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)) on page 1503