fraenum
/ˈfriːnəm/
noun
- A small fold of skin or tissue that holds a body part in place, such as the one under the tongue or inside the upper lip.
- The dentist noticed the fraenum inside her upper lip was attached unusually low.
- The doctor checked the baby's fraenum under the tongue to see if it was too tight.
- Some people have a short fraenum that can make it hard to speak clearly.