Meaning Of The Word Periostracum

Real Dictionary

What's the definition of Periostracum? Find Periostracum meanings, definitions and more at the Real Dictionary online.

Periostracum Meaning

Periostracum Definition
Periostracum Definition

What's The Definition Of Periostracum?

periostracum in American English
a horny covering, secreted as the outermost layer of most mollusk shells, that protects the underlying shell from erosion
noun: the external, chitinlike covering of the shell of certain mollusks that protects the limy portion from acids

periostracum in British English
noun: the thin outer organic covering of a mollusc shell

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