1DCBthe line around your head, especially at the front, where your hair starts growing 〔额上的〕发际线,头发轮廓线
He had put on weight, and his hairline was beginning to recede.
他发福了,头发也开始往后秃了。
2a hairline crack/fractureMIa very thincrack 细微的裂纹/裂缝
a hairline fracture in a bone
细微的骨折
Examples from the Corpus
a hairline crack/fracture• I was worried about a hairline fracture, but luckily it was just a bad lump.• The specialist he consulted on Mondaydiagnoseda hairline fracture of his right wrist and wants to take another look on Friday.• She had a hairline fracture in her leg.