ossified
adjective
[ ˈɒsɪfʌɪd ]
• having turned into bone or bony tissue.
• "ossified cartilage"
• having become rigid or fixed in attitude or position.
• "an ossified institution"
Origin:
late 17th century: from ossify.
ossify
verb
• turn into bone or bony tissue.
• "these tracheal cartilages may ossify"
• become rigid or fixed in attitude or position; cease developing.
• "our political system has ossified"
Origin:
late 17th century: from French ossifier, from Latin os, oss- ‘bone’.