astragalomancy

from The Century Dictionary.

• noun Divination by means of huckle-bones or dice.

from the GNU version of the Collaborative International Dictionary of English.

• noun Divination by means of small bones or dice.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Divination by dice made from huckle-bones. They have four flat sides and two round sides which were marked.
• noun Divination by throwing astragaloi (see etymology above) onto the pages of a picture book.
• noun Simply divination by dice.