Definition

A type of marine animal that belongs to the class of echinoderms, which includes creatures like sand dollars and sea urchins.

Example

The echinoid is often found on the ocean floor, where it plays a role in the marine ecosystem.

Conversation

Have you ever seen an echinoid up close at the beach?

Yeah, I found a cool sea urchin once!

That's awesome! I love how unique each echinoid looks.

Totally, they really add to the beauty of the ocean.

Synonyms & Antonyms

Root Explanation

Echinoid → It is formed from "echinos" (Greek, meaning hedgehog) and the suffix "-oid" (meaning resembling or like). The word "echinoid" refers to marine animals that resemble a hedgehog, specifically echinoderms like sea urchins.

Memory Tip

Think of the Greek word for hedgehog ('echinos') to remember that 'echinoid' describes creatures that resemble a hedgehog, particularly in their spiny appearance.

Visually Confused Words