ceromancy
Divination by pouring melted wax into water and interpreting the bubbles formed.
uncountable
By Ceromancy, where, by the means of Wax dissolved into Water, thou shalt see the Figure, Poutrait and lively Representation of thy future Wife, and of her Fredin Fredaliatory Belly-thumping Blades.
1660, Urquhart tr. Rabelais Gargantua & Pantagruel iii. xxv
Where it comes from
From Ancient Greek κηρός (kērós, “wax”) + -mancy.
Adapted from the Wiktionary entry ceromancy (CC BY-SA 4.0).