dowsing
/ˈdaʊzɪŋ/noun
mass noun
- a technique for searching for underground water, minerals, ley lines, or anything invisible, by observing the motion of a pointer (traditionally a forked stick, now often paired bent wires) or the changes in direction of a pendulum, supposedly in response to unseen influences（探寻地下水、矿物等的）魔叉探物（术）：
as modifier a dowsing rod.魔叉探杆。