plural noun
Ac·​ro·​tho·​rac·​i·​ca | \¦a-krō-thə-ˈra-si-kə\

Definition of Acrothoracica 

: a small order or suborder of barnacles that have the body surrounded by a chitinous mantle and that bore and inhabit cavities (as in mollusk shells or corals)

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!

First Known Use of Acrothoracica

1909, in the meaning defined above

History and Etymology for Acrothoracica

New Latin, from acr- + Thoracica

Keep scrolling for more

Learn More about Acrothoracica

Share Acrothoracica

Statistics for Acrothoracica

Look-up Popularity

Time Traveler for Acrothoracica

The first known use of Acrothoracica was in 1909

See more words from the same year

Comments on Acrothoracica

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


full of whispering sounds

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Vocab Quiz

  • the-education-of-achilles-eugne-delacroix
  • Which is a synonym of discomfit?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

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!