Prismoid

noun

1. A prismatoid having polygons with the same number of sides as bases, and faces that are parallelograms or trapezoids.
2. A prismatoid whose base and top have the same number of sides, and every corresponding pair parallel. See prismatoid, 1.
3. A body that approaches to the form of a prism; a prismatoid.
4. A body that approaches to the form of a prism.
5. A prismatoid that has planar sides, and the same number of vertices in both of its parallel planes