Definition: The word "Ankylosaurus" comes from Greek and means "fossilized crocodile". It refers to a type of dinosaur believed to be around 92 million years old, known for its unique combination of tooth structure and long, slender body. The name 'Ankylosaurus' translates to "crocodile with ankylosaurus head" in English, suggesting it was likely a crocodile-like creature similar to the extinct crocodiles that lived during the dinosaur period.