crinoline

n. [ F., fr. crin hair, L. crinis. ] 1. A kind of stiff cloth, used chiefly by women, for underskirts, to expand the gown worn over it; -- so called because originally made of hair. [ 1913 Webster ]

2. A lady's skirt made of any stiff material; latterly, a hoop skirt. [ 1913 Webster ]