A term meaning remaining or residual. For example, when you stroke a piece of iron with a magnet, the iron keeps some of that magnetism. This is called remanent magnetization.
The term is also used by dowsers to mean the imprint of energy remaining in an area after an object has been moved. This remanence can last for a long time. It explains why some dowsers may be able to find a previous location of an object even though that object is no longer there.