hidromancy
/hɪˈdrɒmənsi/Definitions
1. noun
Divination using water, especially reading patterns in the surface or seeing visions in water.
“The mystic practiced hidromancy to predict the future.”
2. noun
An ancient form of water divination, often associated with the practice of seeing omens or prophecies in water.
“She studied the history of hidromancy and its various techniques.”