dowsing rod(n = noun.artifact) divining rod, dowser, water finder, waterfinder - forked stick that is said to dip down to indicate underground water or oil;
is a kind of stick

aaron's rod, birch rod, black rod, connecting rod, control rod, divining rod, dowsing, drill rod, fishing rod, fly rod, gauging rod, hot rod, jacob's rod, lightning rod, measuring rod, piston rod, retinal rod, rod, rod cell, rod laver, spinning rod, tappet rod, tie rod