A tetradecahedron is a polyhedron with 14 faces. There are numerous topologically distinct forms of a tetradecahedron, with many constructible entirely with regular polygon faces.
A tetradecahedron is sometimes called a tetrakaidecahedron. No difference in meaning is ascribed.. The Greek word kai means 'and'.
An incomplete list of forms includes:
- Tetradecahedra having all regular polygonal faces (all exist in irregular-faced forms as well):
- Archimedean solids:
- Prisms and antiprisms:
- Johnson solids:
- J18: Elongated triangular cupola (4 equilateral triangles, 9 squares, 1 regular hexagon)
- J27: Triangular orthobicupola (8 equilateral triangles, 6 squares)
- J51: Triaugmented triangular prism (14 equilateral triangles)
- J55: Parabiaugmented hexagonal prism (8 equilateral triangles, 4 squares, 2 regular hexagons)
- J56: Metabiaugmented hexagonal prism (8 equilateral triangles, 4 squares, 2 regular hexagons)
- J65: Augmented truncated tetrahedron (8 equilateral triangles, 3 squares, 3 regular hexagons)
- J86: Sphenocorona (12 equilateral triangles, 2 squares)
- J91: Bilunabirotunda (8 equilateral triangles, 2 squares, 4 regular pentagons)
- Tetradecahedra having at least one irregular face: