n.calculator consisting of a cord with attached cords; used by ancient Peruvians for calculating and keeping records
英汉双解大词典
quipu(alsoquippu)
1.
N（名词）
a device of the Incas of Peru used to record information, consisting of an arrangement of variously coloured and knotted cords attached to a base cord (古代秘鲁印加人通过排列各种带有颜色的较小绳结来记录信息的)结绳语