arbacia

noun
ar·​ba·​cia | \ ärˈbāsēə \

Definition of arbacia

1 capitalized : a genus of sea urchins (order Centrechinoida) having the ambulacral plates with three pairs of pores, the periproct covered by four triangular plates, the test rather low and stout, and the spines short with those near the mouth having enameled flattened tips
2 plural -s : a sea urchin of the genus Arbacia

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 arbacia

before the 12th century, in the meaning defined at sense 1

History and Etymology for arbacia

borrowed from New Latin, perhaps from Arbaces, legendary ninth century b.c. Median general (borrowed from Greek Arbákēs) + -ia -ia

Keep scrolling for more

Learn More About arbacia

Time Traveler for arbacia

Time Traveler

The first known use of arbacia was before the 12th century

See more words from the same century

Dictionary Entries Near arbacia

arba

arbacia

arba kanfoth

See More Nearby Entries 

Statistics for arbacia

Cite this Entry

“Arbacia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/arbacia. Accessed 28 Sep. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Love words? Need even more definitions?

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