prognathism

Noun

Meaning

Projection of the jaws.

Source: Webster's dictionary

underbite

condition status

Individuals have small hands, feet, lower jaws and chins, with some alveolar prognathism and wide, low-vaulted noses. Source: Internet

Horses may also experience an overbite/ brachygnathism (parrot mouth), or an underbite/ prognathism (sow mouth, monkey mouth). Source: Internet