Definition

A three-dimensional shape that has eight flat surfaces, known as faces.

Example

The architect designed a building in the shape of an octahedron.

Conversation

Have you ever seen a model of an octahedron?

No, I haven't. What does it look like?

It's a solid shape with eight flat faces, pretty interesting!

That sounds cool! I’d love to see one sometime.

Synonyms & Antonyms

Root Explanation

Octahedron → It is formed from "octa-" (from Greek "okta", meaning eight) and "hedron" (from Greek "hedra", meaning face or base). The word "octahedron" refers to a solid figure with eight faces.

Memory Tip

Think of the prefix 'octa-' meaning eight, and 'hedron' meaning face — so an octahedron is a shape with eight faces.

Visually Confused Words