1) Erred 2) Protrusive 1) Protrusive 2) Underhung 3) Underslung 
The camera is positioned directly beneath the subject, looking up
• (a.) Having the lower incisor teeth projecting beyond the upper ones, as in the bulldog. • (a.) Moved by water passing beneath; -- said of a water wheel, and opposed to overshot; as, an undershot wheel.
The front teeth (incisors) of the lower jaw overlapping or projecting beyond the front teeth of the upper jaw when the mouth is closed.
The front teeth (incisors) of the lower jaw overlapping or projecting beyond the front teeth of the upper jaw when the mouth is closed.
having the front teeth of the lower jaw projecting in front of the upper teeth, as a bulldog. · driven by water passing beneath: an undershot vertical water wheel.