The Collaborative International Dictionary
Fluxional \Flux"ion*al\, a. Pertaining to, or having the nature of, fluxion or fluxions; variable; inconstant.
The merely human,the temporary and fluxional.
--Coleridge.
Fluxional structure (Geol.), fluidal structure.
Wiktionary
a. 1 Pertaining to, or having the nature of, fluxion or fluxions; variable; inconstant. 2 (context chemistry of a compound English) That undergoes rapid intramolecular rearrangements, component atoms being interchanged among equivalent structures.
Usage examples of "fluxional".
Everything in the universe was curved, and those curves were evanescent and fluxional, but with this gesture Isaac snatched a particular curve—it didn’t matter which—down from the humming cosmos, like a frog flicking its tongue out to filch a gnat from a swarm.