[re.flux] n [ME, fr. ML refluxus, fr. L re- + fluxus flow--more at flux] (15c) 1: a flowing back: ebb
2: a process of refluxing or condition of being refluxed
[2]re.flux vt (1926): to cause to flow back or return; esp: to heat so that the vapors formed condense and return to be heated again