The ratio of the mass of a drop, at the instant when it is detached from the tip of the capillary, to the drop time t1; 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 (https://doi.org/10.1351/pac198557101491)