The Collaborative International Dictionary of English v.0.48:

Organdie \Or"gan*die\, Organdy \Or"gan*dy\, n. [F. organdi.]
   A kind of transparent light but stiff muslin.
   [1913 Webster]

WordNet (r) 3.0 (2006):

organdie
    n 1: a sheer stiff muslin [syn: organdy, organdie]