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tooth shell

noun
1.
any marine mollusk of the class Scaphopoda, having a curved, tapering shell that is open at both ends.
2.
the shell itself.
Also called tusk shell.
Origin
1705-1715
1705-15
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for tooth-shell

tooth shell

noun
1.
another name for the tusk shell
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for tooth-shell

tooth 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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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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