leotard
/ˈliːəʊtɑːd/noun
- a close-fitting one-piece garment, made of a stretchy fabric, which covers a person's body from the shoulders to the top of the thighs and typically the arms, worn by dancers or people exercising indoors（舞蹈演员或室内锻炼者穿的）紧身连衣裤（用弹力织物制成, 上至肩下至大腿顶端）。
词源
early 20th cent.: named after Jules Léotard （1839-70）， French trapeze artist.