Widow's peak
A V-shaped point of the front hairline in the middle of the forehead.
Also: peak
A widow's peak is a hairline that dips to a point at the centre of the forehead, forming a V. The name comes from the pointed mourning hoods once worn by widows in Britain. It is a natural variation, like a straight or rounded hairline. Some people show it off with hair swept straight back; others soften it with a side parting or a fringe. It affects how a centre parting or a short fringe will fall.