noun.
Any of various tusk shells of the genus Dentalium, some of which are used for ornament and were used by native peoples of western North America as currency.
The Century Dictionary and Cyclopedia
noun.
The typical and leading genus of the family Dentaliidæ.
the GNU version of the Collaborative International Dictionary of English
noun.
A genus of marine mollusks belonging to the Scaphopoda, having a tubular conical shell.
noun.
Any of various tooth shells of the genus Dentalium
Word Usage
"Bea, our bone specialist, had the final say, identifying one of the three pieces as being possibly of dentalium, from the weird and wonderful world of molluscs."