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The Collaborative International Dictionary
Superfluitant

Superfluitant \Su`per*flu"i*tant\, a. [L. super above + fluitans, p. pr. of fluitare intensive fr. fluere to flow.] Floating above or on the surface. [Obs.]
--Sir T. Browne. -- Su`per*flu"i*tance, n. [Obs.]

Wiktionary
superfluitant

a. (context obsolete English) Floating above or on the surface.