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a. A flow or flowing.
b. Continual change.
2. Archaic
b. fluxions Differential calculus.

[French, from Late Latin flūxiō, flūxiōn-, from Latin flūxus, flux; see flux.]

flux′ion·al adj.
flux′ion·al·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Infinitesimals, differences, and the Method of Fluxions were foremost in the minds of the leading mathematicians.
I know too well that a great majority of Englishmen are fond of The Indefinite which they Measure by Newton's Doctrine of the Fluxions of an Atom, A Thing that does not Exist.
Maclaurin, A treatise on fluxions, Edinburgh: printed by T.W.
The past is not past, the future folds back upon itself, and the present is shot through with fluxions of past and future that destabilize it.
It also reveals Newman as sophisticated thinker about calculus, Newtonian fluxions, evolution, and physical science.
In launching the dissertation, I fortified myself further with his new and landmark essay "The Voice of the Shuttle." At its midpoint, I, together with the rest of us, was rhetorically excused for being "probably impatient" (BF, 347) with its phonetic microstylistics, its phantasmal (and infinitesimal) discriminations no doubt laying themselves open to Bishop Berkeley's complaint about Newton's "fluxions" as the mere "ghosts of departed qualities" (BF, 347).
This author has analyzed the chronological timelines of numerous scientific discoveries, including these: Euclidian Geometry, Newton's derivation of fluxions (calculus), Newton's development of a theory of universal gravitation, unified geometry, thermionic emission, and Pauli's exclusion principle in physics (Harmon, 1973).
in the system (1), r is differential equations of the first degree that include only those generalized coordinates [q.sub.j] (j = 1, 2, r) and their fluxions [[??].sub.j] not presented in the equation of the second fluxions [[??].sub.j] (Eq.
This highly abstract approach to natural philosophy mirrors Leibniz's preference for an algebraic version of the calculus (as opposed to the geometrical 'fluxions' favored by Newton).