Tooth

1. One of a set of hard, bonelike structures rooted in sockets in the jaws of vertebrates, typically composed of a core of soft pulp surrounded by a layer of hard dentin that is coated with cement or enamel at the crown and used for biting or chewing food or as a means of attack or defense. One tooth was broken in the car accident.
2. A projecting part resembling a tooth in shape or function, as on a comb, gear, or saw. Her comb had a broken tooth.