[1] : The Collaborative International Dictionary of English v.0.48

vitis \vi"tis\, prop. n. l., a vine. bot.
   a genus of plants including all true grapevines.
   1913 webster

[2] : WordNet (r) 2.0

vitis
     n : the type genus of the family vitaceae; woody vines with
         simple leaves and small flowers; includes a wide variety
         of grapes syn: genus vitis
see also:
genus vitis 

Vitis >> V Words
Vitis, definition of term: Vitis
vitis_pag1.html