dilution rate, \(D\)

in biotechnology
The ratio of the ingoing @[email protected] (\(\frac{\text{d}V}{\text{d}t}\)) and the culture volume (\(V\)). In continuous @[email protected], a measure of a rate at which the existing medium is replaced with fresh medium, \(D\) is the reciprocal of the hydraulic retention time (\(\mathrm{HRT}\)).
PAC, 1992, 64, 143. (Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)) on page 152 [Terms] [Paper]