眉 refers to the eyebrow. It's often used in expressions describing facial expressions.
COMMON PATTERNS:
- 眉をひそめる (furrow one's brow, frown)
- 眉を上げる (raise eyebrows)
- 眉を描く (draw/apply eyebrows with makeup)
- 眉を剃る (shave eyebrows)
- 眉毛 (eyebrow hair - synonym)
EYE AREA:
IDIOMS:
- 眉唾 = dubious, questionable (from the belief that putting saliva on eyebrows protects against being deceived by foxes)
- 目鼻立ち (facial features - includes 眉)