pentadecahedron
English
![](Images/wiktionary/Elongated_triangular_cupola.png.webp)
An elongated triangular cupola, an example of an pentadecahedron
Etymology
From pentadeca- + -hedron.
Noun
pentadecahedron (plural pentadecahedra or pentadecahedrons)
- (geometry) A polyhedron with fifteen faces.