Definition:Heptahedron

Definition

A heptahedron is a polyhedron which has $7$ faces.

Examples

Pentagonal Prism

A pentagonal prism is an example of a heptahedron.

Hexagonal Pyramid

A hexagonal pyramid is an example of a heptahedron.

Also see

• Results about heptahedra can be found here.

Linguistic Note

The word heptahedron derives from the Classical Greek ἑπτάεδρόν:

hepta (ἑπτά), meaning seven

hedron (a form of ἕδρα), meaning base or seat.

The technically correct plural of heptahedron is heptahedra, but the word heptahedrons can often be found.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): heptahedron (plural heptahedra)
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): heptahedron (plural heptahedra)