trisoctahedron
/trɪˌsɑktəˈhidrən/
noun
- A solid shape with 24 triangular faces, formed by adding a three-sided pyramid to each face of an octahedron.
- The crystal in the museum had the shape of a trisoctahedron.
- Some minerals naturally form trisoctahedron crystals.
- In geometry class, we learned how to draw a trisoctahedron.