refluxes

Refluxes is the plural of reflux, which describes the backward flow of a substance, typically a liquid or gas.

In medicine, acid reflux is when stomach contents flow back into the esophagus, causing heartburn.

In chemistry, refluxing is a technique where a liquid is boiled and its vapors condensed back into the same vessel, allowing prolonged heating without loss of solvent.

The verb reflux means to flow back or to heat using this technique.