tongue stone
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English
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b5/Fossil_Shark_Tooth_Lamniformes.jpg/220px-Fossil_Shark_Tooth_Lamniformes.jpg)
Noun
[edit]tongue stone (plural tongue stones)
- A kind of stone of distinctive shape, most of which are now considered to be fossilized shark's teeth.
Further reading
[edit]Shark tooth on Wikipedia.Wikipedia