The space between the eyebrows and the hairline on the forehead.
This is a very specific word used in anatomy or art.
Examples:
She has a small scar on her metopons.
The artist carefully studied the model's metopons.
The metopons is the part of the face above the eyes.
The baby's metopons is so smooth and soft.
In some cultures, people put decorations on their metopons.
The doctor gently touched the patient's metopons.