Definition

A large, early type of reptile that lived during the Permian period, known for its distinctive tall sail on its back.

Example

The pelycosaur was one of the earliest reptiles to roam the Earth, showcasing unique features like a sail on its back.

Conversation

Have you ever heard of a pelycosaur?

Yeah, I read about them in a book! They look so interesting.

I find their tall spinal sail really fascinating.

Absolutely! It's amazing how they adapted to their environment.

Synonyms & Antonyms

Root Explanation

Pelycosaur → It is formed from "pelycos" (from Greek "pelykos", meaning flat) and "sauros" (from Greek "sauros", meaning lizard or reptile). The word "pelycosaur" refers to a type of flat-bodied reptile, specifically a group of early synapsids that are often characterized by their distinctive sail-like structures on their backs.

Memory Tip

Imagine a 'flat' ('pelykos') reptile ('sauros') — that's what a pelycosaur is, a flat-bodied reptile.

Visually Confused Words