# octahedron

> English word · Noun · frequency rank #85,594

## Definitions
1. a polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids.

## Etymology
From Ancient Greek ὀκτάεδρον (oktáedron). By surface analysis, octa- + -hedron.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/octahedron