Polyhedral dice

polyhedral dice, polyhedral die, n. dice manufactured specifically for hobbyist games such as wargames and RPGs, usu. with four, six, eight, ten, twelve, or twenty sides. Also multi-sided dice. See also xdn, two-sided die, one-sided die, percentile dice. [GJ1]
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Addendum: Polyhedral dice are manufactured in a variety of sizes, shapes and colors, and in a variety of materials, from wood to clear plastic. In addition to the types listed above, a "hundred-sided die" was on the market during the eighties, designed to replace percentile dice. Some dice are manufactured with game-specific markings, such as icons. Gamers often collect different types of dice, and form irrational attachments to them. [GJ1]
Addendum #2: The first set of polyhedral dice was developed specifically for Dungeons and Dragons in 1974, using a set of platonic solid shapes manufactured for a science course. [GJ1]