Pterodactyl as a noun is any of various small, mostly tailless, extinct flying reptiles of the order pterosauria that existed during the jurassic and cretaceous periods while Pteranodon as a noun is a large pterosaur; males had a bony crest on the back of the head.
Part of speech: noun
Definition: Any of various small, mostly tailless, extinct flying reptiles of the order Pterosauria that existed during the Jurassic and Cretaceous periods
Part of speech: noun
Definition: A large pterosaur; males had a bony crest on the back of the head.
We hope you now know whether to use Pterodactyl or Pteranodon in your sentence.