Definition

A type of large, ancient aquatic creature that lived in the sea and is related to scorpions and horseshoe crabs.

Example

Eurypterids were some of the largest arthropods to ever exist in the ocean.

Conversation

Have you ever heard of an eurypterid?

Yeah, they were those giant sea scorpions, right?

Exactly! They lived millions of years ago in the ocean.

That's so fascinating; I love learning about ancient creatures.

Synonyms & Antonyms

Root Explanation

Eurypterid → It is formed from "eu-" (from Greek "eu", meaning good or well) and "pteron" (from Greek "pteron", meaning wing or fin). The word "eurypterid" refers to a group of ancient marine arthropods that are often called "sea scorpions" and are characterized by their well-developed appendages, which can be likened to wings or fins.

Memory Tip

Think of 'good' ('eu-') and 'wing' ('pteron') to remember that eurypterids are ancient creatures with well-developed appendages, resembling wings or fins.

Visually Confused Words