
A hendecahedron (or undecahedron) is a polyhedron with 11 faces. There are numerous topologically distinct forms of a hendecahedron, for example the decagonal pyramid, and enneagonal prism. Three forms are Johnson solids: augmented hexagonal prism, biaugmented triangular prism, and elongated pentagonal pyramid. Two classes, the bisymmetric and the...
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http://en.wikipedia.org/wiki/Hendecahedron

hendecahedron A solid figure with, or having, eleven faces.
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http://www.wordinfo.info/words/index/info/view_unit/972/
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