Late 19th century; earliest use found in Edward Tylor (1832–1917), anthropologist. From Byzantine Greek ὠμοπλατοσκοπία divination by a shoulder blade (Psellus) from ὠμοπλάτη + -σκοπία.
Definition of omoplatoscopy in US English:
omoplatoscopy
nounˌəʊməʊpləˈtɒskəpi
rare
Scapulimancy.
Origin
Late 19th century; earliest use found in Edward Tylor (1832–1917), anthropologist. From Byzantine Greek ὠμοπλατοσκοπία divination by a shoulder blade (Psellus) from ὠμοπλάτη + -σκοπία.