os·se·in 
(ŏsē-ĭn)
(ŏsē-ĭn)n.
The collagen component of bone.
[OSSE(OUS) + -IN.]
- insectivore
- insectivorous
- insecure
- insecurely
- insecureness
- insecurity
- inselberg
- inseminate
- insemination
- inseminator
- insensate
- insensately
- insensateness
- insensibility
- insensible
- insensibleness
- insensibly
- insensitive
- insensitively
- insensitiveness
- insensitivity
- insentience
- insentient
- inseparability
- inseparable