Pantsuit

However, the term "trouser suit" had been used in Britain during the First World War, with reference to women working in heavy industry.

Designers such as Foale and Tuffin in London and Luba Marks in the United States were early promoters of trouser suits.

[2][3] In 1966 Yves Saint-Laurent introduced his Le Smoking, an evening pantsuit for women that mimicked a man's tuxedo.

For example, until 1993, women were not permitted to wear pantsuits (or pants of any kind) on the United States Senate floor.

[8][9][10] In 1993, Senators Barbara Mikulski and Carol Moseley Braun wore pants onto the floor in defiance of the rule, and female support staff followed soon after, with the rule being amended later that year by Senate Sergeant-at-Arms Martha Pope to allow women to wear pants on the floor so long as they also wore a jacket, thus allowing pantsuits, among other types of clothing.