The Collaborative International Dictionary of English v.0.48:

Fluxional \Flux"ion*al\, a.
   Pertaining to, or having the nature of, fluxion or fluxions;
   variable; inconstant.
   [1913 Webster]

         The merely human,the temporary and fluxional.
                                                  --Coleridge.
   [1913 Webster]

   Fluxional structure (Geol.), fluidal structure.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "fluxional":
   affluent, confluent, coursing, decurrent, defluent, diffluent,
   flowing, fluent, fluid, fluidal, fluidic, fluxible, fluxile,
   fluxionary, fluxive, gulfy, gushing, juicy, liquid, liquidy, mazy,
   meandering, pouring, profluent, racing, running, runny, rushing,
   sappy, serpentine, sluggish, streaming, succulent, surging, surgy,
   tidal, vortical, watery