Water memory

Refuted theory behind homeopathic remedies

Water memory is the purported ability of water to retain a memory of substances previously dissolved in it even after an arbitrary number of serial dilutions. It has been claimed to be a mechanism by which homeopathic remedies work, even when they are diluted to the point that no molecule of the original substance remains, but there is no theory for it.

This keyword could refer to multiple things. Here are some suggestions: