Source : Webster's Revised Unabridged Dictionary (1913)

Incan \In"can\, a.
   Of or pertaining to the Incas.

Source : WordNet®

Incan
     n : a member of the small group of Quechuan people living in the
         Cuzco valley in Peru who established hegemony over their
         neighbors to create the great Inca empire that lasted
         from about 1100 until the Spanish conquest in the early
         1530s [syn: {Inca}, {Inka}]