The flow of a fluid (through a pipe etc.) in a direction opposite to that which is normal or intended.
To flow in the wrong or backward direction.
The backwards flow of any fluid.
A technique, using a reflux condenser, allowing one to boil the contents of a vessel over an extended period.
The leaking of stomach acid up into the oesophagus.
To boil a liquid in a vessel having a reflux condenser
To flow back or return.