What is "yunca"

Yunca \Yun"ca\ (y[=oo][ng]"k[.a]), n. An Indian of a linguistic stock of tribes of the Peruvian coast who had a developed agricultural civilization at the advent of the Spaniards, before which they had been conquered by the Incas. They constructed irrigation canals which are still in use, adorned their buildings with bas-reliefs and frescoes, and were skilled goldsmiths and silversmiths. -- Yun"can, a.