A shop where hairdressing, styling, and other beauty treatments are provided. Often used interchangeably with 美容院, though 美容室 can sound slightly more formal or refer to a room within a larger facility.
駅前に新しい美容室ができた。
A new beauty salon opened in front of the station.
美容室で髪を切ってもらった。
I had my hair cut at the beauty salon.
美容院 and 美容室 both mean beauty salon and are largely interchangeable, though 美容室 can sound a bit more like a specific studio or boutique-style shop.
Compound of 美容 (beauty) and 室 (room). The word follows standard Sino-Japanese word formation.