plural noun
Thy·​ros·​tra·​ca | \ thīˈrästrəkə\

Definition of Thyrostraca

in some especially former classifications
: a subclass of Crustacea coextensive with Cirripedia

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!

Other Words from Thyrostraca

thyrostracan \ (ˈ)⸗¦⸗⸗kən \ adjective or noun

History and Etymology for Thyrostraca

New Latin, from thyro- (from Greek thyra door, opening) + Greek ostraka, plural of ostrakon shell

Keep scrolling for more

Learn More about Thyrostraca

Share Thyrostraca

Statistics for Thyrostraca

Look-up Popularity

Comments on Thyrostraca

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


the range of authority or knowledge

Get Word of the Day daily email!

Test Your Vocabulary

Original Meanings Quiz

  • rembrandt-painting-a-young-scholar-and-his-tutor
  • Which of the following is the earliest known sense of the word awe?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Add Diction

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!