Definitions for "Chemostat"
A kind of continuous culture reactor in which the growth rate is controlled by concentration of a medium component  (substrate). Typically, the flow rate of fresh medium is set and growth is limited by depletion of a nutrient.
A device that allows the continuous growth of a bacterial population on a growth-rate-limiting resource. The resource flows into the chemostat at a constant rate; depleted medium and cells are washed out at the same rate. The population grows and consumes the resource until the bacteria reach an equilibrium density at which their growth rate equals the flow rate through the vessel.
constant volume continuous cultivation with fixed flow rate; dilution rate = F/V