The hard chitinous outer covering of the shell of many mollusks, especially freshwater ones, that protects the shell from the erosive action of water.
[New Latin : PERI– + Greek ostrakon, shell.]
n., pl. -ca (-kə).
Join the WikiAnswers Q&A community. Post a question or answer questions about "periostracum" at WikiAnswers.
Copyrights:
 |
 | Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved. Read more |
Search for answers directly from your browser with the FREE Answers.com Toolbar!
Click here to download now. 
Get Answers your way! Check out all our free tools and products.
ADVERTISEMENT
Keep Reading
Mentioned In:
ADVERTISEMENT
Do you have the answers?
ADVERTISEMENT
