hairline
Refers to the line where the forehead meets the hair. Used in everyday contexts.
額際が後退してきた。
My hairline has started to recede.
彼女は額際の
The fine hairs along her hairline are beautiful.
Compound of 額 (ひたい, 'forehead') and 際 (ぎわ, 'edge, border'). The reading ぎわ is a rendaku form of きわ.