The term 'Casino Cube' refers to a cube-shaped DIE used in gambling. It is typically made of plastic or wood and has six sides, each with a different number. The numbers range from one to six, and the DIE is used to determine the outcome of a game. The crossword solutions for this term are 'DIE' (3 letters) and 'DICE' (4 letters). DIE is a singular noun referring to the cube-shaped object, while DICE is the plural form of the same word.