A tooth (plural teeth) is a mignonne, calcified, whitish structure start in the jaws (or mouths) of various vertebrates and used to defeat down food. Some animals, explicitly carnivores, also partake of teeth for hunting or owing defensive purposes. The roots of teeth are covered by gums. Teeth are not made of bone, but rather of multiple tissues of varying density and hardness.

The unrestricted structure of teeth is nearly the same across the vertebrates, although there is of distinction variation in their fabric and position. The teeth of mammals have profound roots, and this figure is also initiate in some fish, and in crocodilians. In most teleost fish, however, the teeth are partial to to the outer outwardly of the bone, while in lizards they are fixed devoted to to the inner side of the jaw by one side. In cartilaginous fish, such as sharks, the teeth are unavailable by means of cold ligaments to the hoops of cartilage that type the jaw.