prismatoid
/ˈprɪzməˌtɔɪd/
noun
- A solid geometric shape whose sides are polygons and whose two ends are parallel, similar polygons (like a prism) or one end is a point (like a pyramid).
- The architect designed the building as a prismatoid with a rectangular base and a triangular top.
- In geometry class, we learned that a prismatoid can be a prism, a pyramid, or a frustum.
- A cube is a simple example of a prismatoid because its opposite faces are parallel and identical.