Source : Webster's Revised Unabridged Dictionary (1913)

Tussah \Tus"sah\ Tusseh \Tus"seh\(t[u^]s"s[.a]), n. [Also
   {tussa}, {tussar}, {tusser}, {tussur}, etc.] [Prob. fr. Hind.
   tasar a shuttle, Skr. tasara, trasara.]
   An undomesticated East Indian silkworn ({Anther[ae]a
   mylitta}), that feeds on the leaves of the oak and other
   plants.

Source : WordNet®

tussah
     n : oriental moth that produces brownish silk [syn: {tusseh}, {tussur},
          {tussore}, {tusser}, {Antheraea mylitta}]