The concept is a mix of singular (tooth) and plural (teeth), but has children separating singular and plural.

When do you use teeth in a sentence?

You should brush your teeth every morning and night. She clenched her teeth in anger. He has a set of false teeth. the teeth of a saw The labor union showed that it has teeth.

What is a teeth?

tooth, plural teeth, any of the hard, resistant structures occurring on the jaws and in or around the mouth and pharynx areas of vertebrates. Teeth are used for catching and masticating food, for defense, and for other specialized purposes. Fast Facts.