chemostat

https://doi.org/10.1351/goldbook.C01053
A bioreactor in which constant growth conditions for microorganisms are maintained over prolonged periods of time by supplying the reactor with a continuous input of nutrients and continuous removal of medium.
Source:
PAC, 1992, 64, 143. 'Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)' on page 149 (https://doi.org/10.1351/pac199264010143)