dowsing

/ˈdaʊzɪŋ/
noun
  1. The practice of using a forked stick or rod to find underground water, minerals, or other hidden objects.
    • Some people believe in dowsing, while scientists say it has no proven basis.
    • Dowsing has been used for centuries to locate water in dry regions.
    • He learned dowsing from his grandfather, who could find water anywhere.