1. A flowing back; ebb.
2. Medicine Backflow, as of gastric acid into the esophagus.
3. Chemistry The process of refluxing.
v. re·fluxed, re·flux·ing, re·flux·es
To boil (a liquid) in a vessel attached to a condenser so that the vapors continuously condense for reboiling.
To be boiled in such a way.
[Medieval Latin reflūxus : Latin re-, re- + Latin flūxus, flow, from past participle of fluere, to flow; see bhleu- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.