Dimple
A small hollow in the cheek, usually seen when a person smiles.
Also: cheek dimple, gelasin
Cheek dimples are small dents that appear in one or both cheeks, mostly with a smile. They are often linked to a variation in the zygomaticus major, a smiling muscle, which may be split into two bundles. Dimples are frequently called a dominant trait, but studies show their inheritance is irregular, and they can come and go between childhood and adulthood. They are found in people everywhere and are prized as charming in many cultures.