n.forked stick that is said to dip down to indicate underground water or oil
同义词：dowserdowsing rodwaterfinderwater finder
英汉双解大词典
divining rod
1.
N（名词）
a rod, usually a forked hazel twig, said to move or dip when held over ground in which water, metal, etc, is to be found 探测杖 (Also called dowsing rod)