| 1. | any marine mollusk of the class Scaphopoda, having a curved, tapering shell that is open at both ends. |
| 2. | the shell itself. |
| tooth shell n. Any of various burrowing marine mollusks of the class Scaphopoda, having a long, tapering, slightly curved tubular shell. Also called scaphopod, tusk shell. |
| tusk shell n. See tooth shell. |
tusk shell
any of several marine mollusks of the class Scaphopoda. There are four genera of tusk shells (Dentalium is typical and most common) and more than 350 species. Most tusk shells live in fairly deep water, sometimes to depths of about 4,000 metres (13,000 feet); many deep-sea species are cosmopolitan in distribution
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