diceboard

plural diceboards

1. A flat surface on which dice are thrown.

   He says he saw pictures thrown upon the ground, and soldiers using them for diceboards.

   1896, Mahaffy, Greek Life and Thought from the Death of Alexander to the Roman Conquest, page 602

   1 more example

   In the area near the entrance many of the patients were sitting up, talking or playing at diceboards.

   2024, Martha Wells, Wheel of the Infinite: Updated and Revised Edition