Definition:Heptahedron/Linguistic Note

Linguistic Note on Heptahedron
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.