— ossifier , n.
/os"euh fuy'/ , v. , ossified, ossifying .
v.t.
1. to convert into or cause to harden like bone.
v.i.
2. to become bone or harden like bone.
3. to become rigid or inflexible in habits, attitudes, opinions, etc.: a young man who began to ossify right after college.
[ 1705-15; ossi- (s. of os ) bone + -FY ]