Frontal scale refers to the scale of a reptile which lies on the top of the head in the region between the eyes. This is analogous to the frontal bone of a human which corresponds to the forehead.
![](http://upload.luquay.com/wikipedia/commons/thumb/3/3c/AB045_Scales_on_a_snakes_head.jpg/300px-AB045_Scales_on_a_snakes_head.jpg)
Snake scales adjacent to the frontal and to its anterior are called prefrontals.
See also
edit