hairline
🇺🇸
/ˈherlaɪn/
🇬🇧
/ˈheəlaɪn/
The thin edge where hair meets the forehead.
He noticed his hairline was receding as he looked in the mirror.
他注意到当他照镜子时,他的发际线正在后退。
An extremely thin crack or line.
The vase had a hairline fracture that was barely visible.
花瓶上有一条几乎看不见的裂纹。