"thin, stiff, transparent dress fabric," 1820, from French organsin (1660s), and Italian organzino, a strong kind of silk thread, a word of unknown origin; perhaps from the same source as organdy.
Entries linking to organza
organdy n.
also organdie, "fine, transparent muslin used for women's dresses," 1829, from French organdi, defined as "sorte de Mousseline ou toile de coton" (1725), of unknown origin. Barnhart suggests it is an alteration of Organzi, from the medieval form of Urgench, a city in Uzbekistan that was a cotton textile center.