plural noun
Pa·​rap·​si·​da | \ pəˈrapsədə\

Definition of Parapsida

in some classifications
: a subclass of reptiles in which the skull has two dorsal temporal openings adjoining the parietals and which includes the ichthyosaurs and related extinct forms and sometimes the lizards and snakes — compare diapsida

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for Parapsida

New Latin, from para- entry 1 + -apsida (from Greek hapsid-, hapsis arch, loop)

Keep scrolling for more

Comments on Parapsida

What made you want to look up Parapsida? Please tell us where you read or heard it (including the quote, if possible).


to affect and impair by alcohol or a drug

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!