Merriam-Webster Collegiate Dictionary - bloomer

 biographical name Amelia 1818-1894 nee Jenks American reformer BLOOMER  I. noun  Date: 1727  1. a plant that blooms  2. a person who reaches full competence or maturity he was a late ~ as a writer  3. blooming a stupid blunder  II. noun  Etymology: Amelia Bloomer  Date: 1851  1. a costume for women consisting of a skirt over long loose trousers gathered closely about the ankles  2. plural  a. full loose trousers gathered at the knee formerly worn by women for athletics  b. underpants of similar design worn chiefly by girls and women