Crinoline
/ˈkrɪnəlɪn/
Definition 1 of 2
Pro Tip 1/3Historical Fashion
Originally, crinoline referred to a stiff material for women's undergarments in the 1800s. 
Museum exhibits on fashion might display crinoline undergarments.
Pro Tip 2/3Victorian Context
The use of crinoline was prevalent in the Victorian era, so it often shows up in historical discussions. 
The Victorian dress displayed impressive volume thanks to the crinoline.
Pro Tip 3/3Fashion Evolution
Crinoline style has evolved and is less common today, but the term still appears in historical or fashion contexts. 
Her vintage gown was reminiscent of the crinoline period.