1. chemostat - Noun
2. chemostat - Verb
English Wikipedia has an article on:chemostatWikipedia
chemostat (plural chemostats)
(biochemistry) An apparatus for the continuous culture of microorganisms in a steady state
chemostat (third-person singular simple present chemostats, present participle chemostatting, simple past and past participle chemostatted)
(chemistry) To keep the concentration of a chemical constant