vet·i·ver 
(vĕtə-vər)
(vĕtə-vər)n.
1. A grass (Vetiveria zizanioides syn. Chrysopogon zizanioides) of tropical India, often planted to control erosion and widely cultivated for its aromatic roots, which yield an oil used in perfumery.
2. The essential oil obtained from the roots of this plant. Also called vetivert.
[French vétiver, from Tamil veṭṭivēr : veṭṭi, worthless + vēru, useless.]