pl. dice towers; v. to dice-tower, dice-towering, dice-towered; also die tower, die towers
in tabletop gaming, esp. role-playing games and wargames, a tabletop accessory designed to help roll dice, while keeping them from rolling wildly off the table; a small box or “tower” with a hole at the bottom — dice are dropped in the top of the box, and roll out the hole in the bottom, stopping in a small area just in front of the tower; from English dice + tower; date for this context unknown. Do not confuse with dice-box.
Addendum: While gamers generally believe the dice tower to be a modern invention, there is a surprisingly modern dice tower dated to the 4th Century CE.