Definition of "Ersu"

Ersu

proper noun
1. A Qiangic (Sino-Tibetan) language cluster, spoken by about 20,000 people in China.
  Quotations
  As for those who speak Ersu, Guiqlong, and Namuyl, they used to be called, pejoratively, "Xifan" (western barbarians).
  1989, Linguistics of the Tibeto-Burman Area, volumes 12-13, page 27