Polychord

n. [See infra.] (Mus.) (a.) A musical instrument used among the ancients, having ten strings. Roget. (b.) An apparatus for coupling two octave notes, capable of being attached to a piano or other keyed instrument. Simmonds.

a. [Gr. πολυχόρδος, from πολὺς, many, and χορδή, string, cord.] Having many cords or strings.