refluxing

verb
  1. present participle of reflux; flowing back or returning in a reverse direction
  2. Usage: medical; technical
  3. heating a liquid in a vessel connected to a condenser so that vapor produced is condensed and returned to the vessel
  4. Usage: chemistry
noun
  1. the process of reflux; the backward flow of liquid or the chemical process of heating with condensation
  2. Usage: technical

Examples