noun. any polyhedron having five plane faces.
- -hedron (English)
- ἕδρα (Ancient Greek (to 1453))
- penta- (English)
- πέντε (Ancient Greek (to 1453))
Example sentences of the word pentahedron
1. Noun, singular or mass
A pyramid is also a pentahedron, but it only has one rectangular side and the four triangle-shaped sides meet at a single vertex or point.