dowsing -
The practice of seeking water or other substances usually liquid with the aid of a forked stick or similar pointing device, as believed by some practitioners to derive from supernatural power.
Verb
dowsing -
Present participle of dowse.
OmegaWiki Dictionary
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dowsing Refers to practices which some people claim enables them to detect hidden water, metals, gemstones or other objects, usually obstructed by land or sometimes located on a map (source Wikipedia).