noun
hairline; borders of the hair
Refers to the line where the hair meets the forehead or the edges of the hair on the head.
年をとると生え際が後退することがある。
As you get older, your hairline may recede.
彼女は生え際の産毛がきれいだ。
The fine hairs along her hairline are beautiful.
Compound of 生え (hae, 'growing', from verb 生える haeru) and 際 (giwa, 'edge, verge').