The Collaborative International Dictionary
Decachord
Decachord \Dec"a*chord\, Decachordon \Dec`a*chor"don\, n. [Gr. deka`chordos tenstringed; de`ka ten + chordj` a string.]
An ancient Greek musical instrument of ten strings, resembling the harp.
Something consisting of ten parts.
--W. Watson.
Wiktionary
decachord
n. An Ancient Greek musical instrument with ten strings, resembling the harp.