Ilmu’l-Aktaf

ILMU ‘L-AKTAF علم الاكتاف
The science of divining by the shoulder-blades of sheep. It was the custom of the ancient Arabs to place the shoulder-bone of a sheep in the sun, and to examine it, in the same way as by the science of palmistry (Kashfu ‘z-Zunun, in loco.)

Based on Hughes, Dictionary of Islam