The Collaborative International Dictionary of English v.0.48:

Vetiver \Vet"i*ver\, n. (Bot.)
   An East Indian grass (Andropogon muricatus); also, its
   fragrant roots which are much used for making mats and
   screens. Also called kuskus, and khuskhus. [Sometimes
   written vetivert, and vitivert.]
   [1913 Webster]