11 letters · 24 points in Scrabble
noun searching for underground water or minerals by using a dowsing rod
originFrom rhabdo- + -mancy, first attested in 1646. From Latin rhabdomantīa, from Ancient Greek ῥαβδομαντεία (rhabdomanteía), from ῥάβδος (rhábdos, “rod”) + μαντεία (manteía, “divination”).
Etymology from Wiktionary, CC BY-SA 3.0