The Collaborative International Dictionary of English v.0.48:

Gomuti \Go*mu"ti\, n. [Malayan gumuti.]
   A black, fibrous substance resembling horsehair, obtained
   from the leafstalks of two kinds of palms, Metroxylon Sagu,
   and Arenga saccharifera, of the Indian islands. It is used
   for making cordage. Called also ejoo.
   [1913 Webster]