what is a spinifex
1 Spinifex (genus) , a genus of grass which is indigenous to the coastal areas of Australasia and Indonesia. 2  Triodia (plant) , a hummock grass of arid Australia, covering twenty percent of the Australian continent (although not technically Spinifex, it is commonly referred to as such).3  Spinifex resin. Triodia (plant) , a hummock grass of arid Australia, covering twenty percent of the Australian continent (although not technically Spinifex, it is commonly referred to as such). 2  Spinifex resin. 3  Spinifex hopping mouse, a mouse native to the central and western Australian arid zones.