efflux
/ˈeflʌks/noun
mass noun
1- technical the flowing out of a particular substance or particle〈技〉（物质或微粒的）流出, 发出, 散出。
1.1
- material flowing out in this way流出物, 散发物。
词源
mid 16th cent.: from medieval Latin effluxus, from effluere 'flow out'.