dowser
From Longman Dictionary of Contemporary EnglishRelated topics: Occupations, Folkloredowserdows‧er /ˈdaʊzə $ -ər/ noun [countable] BORFsomeone who dowses for water or mineralsExamples from the Corpusdowser• Bearing in mind the cautions of Chapter 5, what have dowsers to tell us about sites and earth energies?• It is generally invisible, but can be detected by sensitives or dowsers.• Traditional rural dowsers used wooden sticks to locate underground water.• The dowsing response can tell as much about the dowser as about the site under investigation.