Not shaped like or resembling a dodecahedron (a geometric solid with twelve pentagonal faces).
From dis- (not) + dodecahedroid (from Greek dodeca- twelve + hedron face + -oid resembling). A rare geometric term from mathematics describing shapes that deviate from dodecahedral symmetry.
Ancient Mediterranean traders who used twelve-sided dice would immediately recognize when a die wasn't disdodecahedroid—a truly twelve-sided die rolls fairly, but irregular ones roll toward certain numbers, which is why they became tools for cheating.
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