Home › Words › M › milliosmolemilliosmolemilliosmole · noun — A unit of measurement equal to one thousandth of an osmole.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom milli- + osmole.nounA unit of measurement equal to one thousandth of an osmole.Definitions & examples from Wiktionary (CC BY-SA 3.0).