Dogtooth (Greek: Κυνόδοντας, translit. Kynodontas) is a 2009 Greek film directed by Yorgos Lanthimos about a husband and wife who keep their children ignorant of the world outside their property well into adulthood. The drama stars Christos Stergioglou, Michelle Valley, Angeliki Papoulia, Mary Tsoni, and Christos Passalis.
Lanthimos' second feature film won the Prix Un Certain Regard at the 2009 Cannes Film Festival and was nominated for Best Foreign Language Film at the 83rd Academy Awards.
A married couple and their three young adult children, a son and two daughters, live in a large compound with a garden and swimming pool. A tall fence surrounds the property and the children have never been on the other side of it, for their parents have kept them unaware of the outside world, even of the existence of the telephone. They are taught different meanings for everyday words. The parents promise that each child will be ready to venture outside the compound once she or he has lost a dogtooth. Although the children are told they have a brother just on the other side of the barrier, he never appears.