dentin
Concise Oxford English Dictionary © 2008 Oxford University Press:
dentine /ˈdɛntiːn/ (US dentin /-tɪn/)
▶noun hard dense bony tissue forming the bulk of a tooth.
– derivatives
dentinal /ˈdɛntɪn(ə)l/ adjective.
dentinal /ˈdɛntɪn(ə)l/ adjective.
'dentin' also found in these Oxford entries:

