Definitions For Periostracum
Noun
{{en-noun, periostraca}} (malacology) The proteinaceous outer sheath of many molluscan shells.Derived terms
periostracalEtymology
literally "surrounding shell", from peri + ostracum.Is Periostracum a Scrabble Word?
Words With Friends
NO
Scrabble US
NO
Scrabble UK
YES
English International (SOWPODS)
YES
Scrabble Global
YES
Enable1 Dictionary
NO
Points in Different Games
Scrabble
18
Words with Friends
22
The word Periostracum is worth 18 points in Scrabble and 22 points in Words with Friends