From Latin 'fluxus' (a flowing), from 'fluere' (to flow) — literal flowing, constant change, and a physics term for flow rate.
The action or process of flowing; continuous change; a substance used to help metals fuse during soldering or smelting; (in physics) the rate of flow of a property per unit area.
From Latin 'fluxus' (a flowing, a discharge, a stream), the past participle used as a noun from 'fluere' (to flow, to run, to stream), from PIE *bhleu- (to swell, to overflow, to flow abundantly). 'Fluere' generated one of Latin's most productive derivative families: 'flumen' (river), 'fluctus' (wave), 'fluctuāre' (to fluctuate), 'fluidus' (fluid), 'influere' (to flow in), 'effluere' (to flow out), 'confluere' (to flow together), and 'affluere' (to flow toward). The English derivatives form a cascade: 'fluent,' 'fluid,' 'fluctuate,' 'influence,' 'influenza,' 'effluent,' 'affluent,' '
In physics, 'flux' has a precise mathematical meaning: the rate at which a quantity passes through a surface. Electric flux, magnetic flux, heat flux, and luminous flux all measure how much of something 'flows' through an area. The unit of magnetic flux, the 'weber,' measures the total magnetic field passing through a surface — a direct mathematical formalization of the Latin