selenomancy

English

Etymology

From seleno- +‎ -mancy.

Noun

selenomancy (uncountable)

1. Divination by the appearance and phases of the moon. Similar to lunomancy.
   • 1923, Lynn Thorndike, A History of Magic and Experimental Science, page 98:

     He is openly incredulous about the gem glossopetra, shaped like a human tongue and supposed to fall from the sky during an eclipse of the moon and to be invaluable in selenomancy.

   • 2019, Leah Hager Cohen, Strangers and Cousins, page 240:

     For millennia we have tried to fathom it: via selenography and selenomancy, poetry and algebra, robots and rockets.