Source : Webster's Revised Unabridged Dictionary (1913)

Tulle \Tulle\, n. [Cf. F. tuile a tile.]
   In plate armor, a suspended plate in from of the thigh. See
   Illust. of {Tasses}.

Tulle \Tulle\, n. [F.; -- so called from the town of Tulle, in
   France.]
   A kind of silk lace or light netting, used for veils, etc.

Source : WordNet®

tulle
     n : a fine (often starched) net used for veils or tutus or gowns