Home › Words › O › osmoregulatorosmoregulatorosmoregulator means any organism that practices osmoregulation.Among words judged in Lexicurio's Arena, osmoregulator ranks #35,463 of 42,752 for Qualifying.EtymologyFrom osmo- + regulator.nounAny organism that practices osmoregulationDefinitions & examples from Wiktionary (CC BY-SA 3.0).