periostracum

periostracum

[per-ee-os-truh-kuhm]
noun, plural periostraca [per-ee-os-truh-kuh] .
the external, chitinlike covering of the shell of certain mollusks that protects the limy portion from acids.

Origin:
1830–40; < Neo-Latin, equivalent to peri- peri- + ostracum a shell < Greek óstrakon. See oyster

periostracal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To periostracum
Explore Dictionary.com
Previous Definition: periostracal
Next Definition: periotic
Words Near: periostracum
More from Thesaurus.com
Synonyms and Antonyms for periostracum
More from Reference.com
Search for articles containing periostracum
More from Dictionary.com Translator
Dictionary.com Word FAQs

Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.

Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature