Scapulimancy (also spelled scapulomancy and scapulamancy, also termed omoplatoscopy ) is the practice of divination by use of scapulae (shoulder blades). In the context of the oracle bones of ancient China, which chiefly utilized both scapulae and the plastrons of turtle, scapulimancy is sometimes used in a very broad sense to jointly refer to both scapulimancy and plastromancy (similar divination using plastrons).