Hairline
The edge where scalp hair begins along the forehead and temples.
Also: frontal hairline
The hairline frames the top of the face. It may be straight, rounded, M-shaped, uneven or pointed in the middle as a widow's peak. Hairlines often rise with age, especially in men, a change usually called a receding hairline; it is common and normal. Because face length is measured from the hairline, its shape affects how a face shape is read. Barbers shape a beard and haircut with the hairline in mind.