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