Flux"ion (?), n. [Cf. F.
fluxion.] The act of flowing. Cotgrave.
2. The matter that flows.
Wiseman.
3. Fusion; the running of metals into a fluid
state.
4. (Med.) An unnatural or excessive
flow of blood or fluid toward any organ; a determination.
5. A constantly varying indication.
Less to be counted than the fluxions of sun
dials.
De Quincey.
6. (Math.) (a) The
infinitely small increase or decrease of a variable or flowing
quantity in a certain infinitely small and constant period of time;
the rate of variation of a fluent; an incerement; a
differential. (b) pl. A method of
analysis developed by Newton, and based on the conception of all
magnitudes as generated by motion, and involving in their changes the
notion of velocity or rate of change. Its results are the same as
those of the differential and integral calculus, from which it
differs little except in notation and logical method.
