In geometry, the dodecagonal prism is the tenth in an infinite set of prisms, formed by square sides and two regular dodecagon caps.

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Uniform dodecagonal prism
Type	Prismatic uniform polyhedron
Elements	F = 14, E = 36, V = 24 (χ = 2)
Faces by sides	12{4}+2{12}
Schläfli symbol	t{2,12} or {12}×{}
Wythoff symbol	2 12 | 2 2 2 6 |
Coxeter diagrams
Symmetry	D12h, [12,2], (*12.2.2), order 48
Rotation group	D12, [12,2]+, (12.2.2), order 24
References	U76(j)
Dual	Dodecagonal dipyramid
Properties	convex, zonohedron
Vertex figure 4.4.12

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If faces are all regular, it is a uniform polyhedron.

It is used in the construction of two prismatic uniform honeycombs:

Omnitruncated triangular-hexagonal prismatic honeycomb

Truncated hexagonal prismatic honeycomb

The new British one pound (£1) coin, which entered circulation in March 2017, is shaped like a dodecagonal prism.^[1]