What is a dinosaur?

Dinosaurs were reptilian and most hatched from eggs. No dinosaurs could fly and none lived in the water. They lived during the Mesozoic Era which covered the triassic, jurassic and creteceous period (248 million years ago – 65 million years ago).

Elaborate:

Some animals that WERE dinosaurs:

  • Tyrannosaurus Rex
  • Triceratops
  • Brachiosaurus
  • Velociraptor

Some animals that WERE NOT dinosaurs:

  • Dimetridon
  • Plesiosaurs
  • Pteranodon
  • Teratosaurus

What Is A Dinosaur

Reason For Asking:

I’m not sure if this was what everyone experience growing up, but I don’t think I was ever given a definition of ‘dinosaur’ clear enough to understand exactly what was a dinosaur and what wasn’t a dinosaur.

Source: Enchanted Learning: What Is A Dinosaur
Source: Wiki: What Is A Dinosaur