Newton's term for a variable in his method of fluxions (differential calculus).
Fluent
See also
Calculus, FluxionExplore with Wolfram|Alpha
References
Newton, I. Methodus fluxionum et serierum infinitarum. 1664-1671.Referenced on Wolfram|Alpha
FluentCite this as:
Weisstein, Eric W. "Fluent." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Fluent.html