go·det 
(gō-dĕt)
(gō-dĕt)n.
A triangular piece of fabric usually set into the hem of a garment to add fullness.
[French : god- in goder, to pucker (of fabric), bunch up (from godron, gadroon, pleat, from Middle French goderon, from Old French, gadroon; see GADROON) + -et, diminutive suffix (from Middle French, from Old French; see -ET).]