incisive foramen n.
Any of usually four openings of the incisive canals into the incisive fossa of the hard palate.
The shape and dimensions of the incisive foramen long have been recognized as providing specific characters.
There seems to be a certain correlation between small size of the incisive foramen and high degree of humidity in the environment.
This vomerine sheath forms a bridge which longitudinally crosses the incisive foramen; the structure of this bridge varies widely.