tooth in WordNet English dictionary

1. a means of enforcement
   "the treaty had no teeth in it"
   tooth 
   
2. toothlike structure in invertebrates found in the mouth or alimentary canal or on a shell
   tooth 
   
3. something resembling the tooth of an animal
   tooth 
   
4. one of a number of uniform projections on a gear
   tooth 
   
5. hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense
   tooth