Definition

A type of large, extinct lizard that lived in the water and had paddle-like limbs for swimming. These creatures were carnivorous and are believed to be related to modern monitor lizards.

Example

The mosasaur was one of the largest predators in the ocean during the Cretaceous period.

Conversation

Did you know that a mosasaur was one of the largest marine reptiles?

Really? I always thought they were just big fish.

Nope! They were actually lizards, and they lived during the time of the dinosaurs.

That's so interesting! I need to read more about these fascinating creatures.

Synonyms & Antonyms

Root Explanation

Mosasaur → It is formed from "Mosasaurus" (from Latin *Mosa*, referring to the Meuse River in Belgium, where the first fossils were found, and Greek *sauros*, meaning lizard or reptile). The word "mosasaur" refers to a lizard-like creature from the Meuse River region.

Memory Tip

Think of the 'Mosa' from the Meuse River where these fossils were discovered, combined with 'sauros' meaning lizard, to remember that a mosasaur is a lizard-like creature from that area.

Visually Confused Words