This is the anterolateral projection at each side of the chin or mentum. These rounded projections form the inferior angles at the base of the triangular mental protuberance.

From the Latin mentum meaning chin, which in turn probably derived from Latin minae meaning a projecting point. Therefore the word means, the projection of the mandible. Tubercle arises from the Latin tuber for a lump and the diminutive suffix -cle denoting a small lump.

Tuberculum mentale

Tubercule mentonnier