arca

noun
ar·​ca | \ ˈärkə \

Definition of arca

1 plural arcae\ -​ˌkī , -​ˌsē \ [Latin] : a chest or strong box used in ancient times as a receptacle for money or valuables and also by early Christians for reserving the consecrated bread of the Eucharist
2 capitalized : a genus (the type of the family Arcidae) of bivalve mollusks comprising the ark shells and blood clams

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 arca

New Latin, from Latin, chest, box

Keep scrolling for more

Learn More About arca

Dictionary Entries Near arca

ARC

arca

Arcacea

See More Nearby Entries 

Statistics for arca

Cite this Entry

“Arca.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/arca. Accessed 21 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon
Seen & Heard
People are talking about

WORD OF THE DAY

Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

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!