The Collaborative International Dictionary
Sciomancy
Sciomancy \Sci"o*man`cy\, n. [Gr. ? a shadow + -mancy: cf. F. sciomance, sciamancie.] Divination by means of shadows.
Douglas Harper's Etymology Dictionary
sciomancy
"divination by ghostly communication," 1620s, from Modern Latin sciomantia, from scio-, Latinized comb. form of Greek skia "shade, shadow" (see shine (v.)) + Latinized form of Greek manteia (see -mancy).
Wiktionary
sciomancy
n. 1 divination using shadows 2 divination using ghosts or spirits