noun
Poetic or old-fashioned term for the ring finger, literally 'rouge-applying finger'. In modern Japanese, 薬指 (くすりゆび) is the usual word.
「紅差し指」は、昔、紅をさすときに使った指を指す雅語です。
紅差し指 is an elegant word for the finger once used to apply rouge.
The standard modern word for 'ring finger'. 紅差し指 is a rare, poetic synonym.
Compound of 紅 (べに, 'rouge') + 差し (さし, 'applying') + 指 (ゆび, 'finger'). The name comes from the historical use of this finger to apply rouge.