QUIPUS
Noun
quipus
plural of quipu
Source: Wiktionary
QUIPU
Qui"pu, n.; pl. Quipus. Etym: [Peruv.quipu a knot.]
Definition: A contrivance employed by the ancient Peruvians, Mexicans,
etc., as a substitute for writing and figures, consisting of a main
cord, from which hung at certain distances smaller cords of various
colors, each having a special meaning, as silver, gold, corn,
soldiers. etc. Single, double, and triple knots were tied in the
smaller cords, representing definite numbers. It was chiefly used for
arithmetical purposes, and to register important facts and events.
[Written also quipo.] Tylor.
The mysterious science of the quipus . . . supplied the Peruvians
with the means of communicating their ideas to one another, and of
transmitting them to future generations. Prescott.
Source: Webster’s Unabridged Dictionary 1913 Edition