REFLUX
ebb, reflux
(noun) the outward flow of the tide
reflux
(noun) an abnormal backward flow of body fluids
Source: WordNet® 3.1
Noun
reflux (countable and uncountable, plural refluxes)
The backwards flow of any fluid.
(chemistry) A technique, using a reflux condenser, allowing one to boil the contents of a vessel over an extended period.
(pathology) The leaking of stomach acid up into the oesophagus.
Verb
reflux (third-person singular simple present refluxes, present participle refluxing, simple past and past participle refluxed)
To flow back or return.
To boil a liquid in a vessel having a reflux condenser
Source: Wiktionary
Re"flux` (r"flks`), a.
Definition: Returning, or flowing back; reflex; as, reflux action.
Re"flux`, n. Etym: [F. reflux. See Refluent, Flux.]
Definition: 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 Unabridged Dictionary 1913 Edition