Home › Words › U › upfluxupfluxupflux · noun — an upward flux.Definition from Wiktionary (CC BY-SA 3.0).Among words judged in Lexicurio's Arena, upflux ranks #28,528 of 43,042 for Qualifying.EtymologyFrom up + fluxnounan upward fluxe.g.“The ion upflux is a free parameter in our model.”Definitions & examples from Wiktionary (CC BY-SA 3.0).