Reflux \Re"flux`\ (r?"fl?ks`), a. Returning, or flowing back; reflex; as, reflux action.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Reflux \Re"flux`\, n. [F. reflux. See Refluent, Flux.]

A flowing back, as the return of a fluid; ebb; reaction; as, the flux and reflux of the tides.

All from me Shall with a fierce reflux on me redound. --Milton.

Source: Webster's Revised Unabridged Dictionary (1913)