Facial Angle, an angle formed by drawing two lines, one horizontally from the nostril to the ear, and the other perpendicularly from the advancing part of the upper jawbone to the most prominent part of the forehead, an angle by which the degree of intelligence and sagacity in the several members of the animal kingdom is by some measured.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Facciolati, Jacopo * Faërie Queene