Definition

A type of rock that is hollow inside and often contains crystals or minerals on its inner surface.

Example

The geode was filled with beautiful quartz crystals that sparkled in the light.

Conversation

Have you ever seen a real geode?

No, I haven't! What do they look like?

They're usually round rocks with crystals inside, really beautiful.

That sounds amazing! I'd love to find one on a hike.

Synonyms & Antonyms

Root Explanation

Geode comes from the Greek word "geodes" (meaning earth-like or resembling the earth), which is derived from "geo-" (meaning earth) and "-eides" (meaning form or shape). A geode is a rock formation that resembles the earth on the outside but contains a cavity lined with crystals or mineral matter inside.

Memory Tip

Think of 'geo-' meaning earth, and remember that a geode is a rock that looks like the earth on the outside but has a beautiful crystal formation inside.

Visually Confused Words