periostracum /per-i-osˈtrə-kəm/

The horny outer layer of a mollusc's shell

• homophobias
• homophobic
• homophone
• homophones
• homophonic
• homophonies
• homophonous
• homophony
• homophylies
• homophyly
• homoplasies
• homoplasmies
• homoplasmy
• homoplastic
• homoplasy
• homopolar
• homopolarities
• homopolarity
• homopolymer
• homopolymers
• Homoptera
• homopterous
• Homorelaps
• homos
• Homo sapiens