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n. pl. den·ta·li·a (-lē-ə) or den·ta·li·ums
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.

[New Latin Dentālium, genus name, from dentālis, toothy; see dental.]


n, pl -liums or -lia (-lɪə)
(Animals) any scaphopod mollusc of the genus Dentalium. See tusk shell
[C19: New Latin, from Medieval Latin dentālis dental]