Women's lacrosse, sometimes shortened to lax, is a field sport played at the international level with two opposing teams of ten players each. Originally played by indigenous peoples of the Americas, the modern women's game was introduced in 1890 at the St Leonard's School in St Andrews, Scotland. The rules of women's lacrosse differ significantly from men's field lacrosse. The two are often considered to be different sports with a common root.

St Leonards School is a private boarding and day school for pupils aged 4–19 in St Andrews, Fife, Scotland. Founded in 1877 as St Andrews School for Girls Company, it adopted the St Leonards name upon moving to its current premises, the site formerly occupied by the University of St Andrews’ St Leonard's College, in 1883.