: the bony protuberance at the front of the lower jaw forming the chin.

What are mental tubercles?

Medical Definition of mental tubercle : a prominence on each side of the mental protuberance of the mandible.

Where are the mental tubercles located?

The symphysis of the external surface of the mandible divides below and encloses a triangular eminence, the mental protuberance, the base of which is depressed in the center but raised on either side to form the mental tubercle.