The Collaborative International Dictionary
Meteoromancy
Meteoromancy \Me`te*or"o*man`cy\, n. [Meteor + -mancy : cf. F. m['e]t['e]oromancie.] A species of divination by atmospheric phenomena, chiefly by thunder and lightning, which was held in high estimation by the Romans.
Wiktionary
meteoromancy
n. divination by interpreting meteorological phenomena such as meteors.