Home › Words › N › niosomeniosomeniosome means A vesicle composed of a nonionic surfactant and cholesterol.Among words judged in Lexicurio's Arena, niosome ranks #7,463 of 42,752 for Qualifying.EtymologyAbbreviated nonionic + -some.nounA vesicle composed of a nonionic surfactant and cholesterolDefinitions & examples from Wiktionary (CC BY-SA 3.0).