These protuberances, of the convex external surface, sit approximately three centimeters above the midline of the superior margin of each orbit, marking the gradual bend of the forehead posteriorly.

Frontal comes from the Latin words frons meaning front and frontis referring to the forehead or brow. The word was used to denote anterior or a relation to the forehead or brow. Tuber is Latin meaning a lump.

Tuber frontale

Eminentia frontalis

Bosse frontale