# polyhedron

> English word · Noun · IPA /ˌpɒlɪˈhiːdɹən/ · frequency rank #88,723

## Definitions
1. A solid figure with many flat faces and straight edges.
2. A polyscope, or multiplying glass.
3. A stage in the growth of Hydrodictyon, when the resting spore breaks up into several megazoospores that put out horn-like appendages; these polyhedra break up into zoospores.

## Etymology
From New Latin polyedron, from Ancient Greek πολύεδρος (polúedros, “having many seats”), from πολυ- (polu-, “many”) + ἕδρα (hédra, “seat”); compare French polyèdre. By surface analysis, poly- + -hedron.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/polyhedron