Merriam-Webster Logo
SINCE 1828
dictionary
thesaurus
view recents

endostracum

noun
Save Word
end·​os·​tra·​cum
plural endostraca\ -​kə \

Definition of endostracum

: the inner layer of a shell especially of a crustacean

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 endostracum

New Latin, from end- + Greek ostrakon hard shell; akin to Greek osteon bone

Keep scrolling for more

Learn More About endostracum

Statistics for endostracum

Cite this Entry

“Endostracum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endostracum. Accessed 24 Jun. 2021.

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

WORD OF THE DAY

forswear

Listen to the pronunciation of forswear

See Definitions and Examples »

Test Your Vocabulary

Return of Name that Color!

  • a light greenish blue color
  • Name that color:
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

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!

Words at Play
Ask the Editors
Word Games