👉 A heptahectron (or heptahedron) is a type of solid that can be made by combining two or more hexagonal prisms. The name "heptahectron" is derived from the Greek word "hexa-" which means six, and "-tetra-" which means three. The most common form of heptahectron is composed of six hexagonal prisms stacked on top of each other, forming a solid that has a size of