The Collaborative International Dictionary
Osteodentine
Osteodentine \Os`te*o*den"tine\, n. [Osteo- + dentine.] (Anat.) A hard substance, somewhat like bone, which is sometimes deposited within the pulp cavity of teeth.
Wiktionary
osteodentine
n. (context anatomy English) A hard bony substance that is sometimes deposited within the pulp cavity of tooth.