dichord

di- +‎ chord

dichord (plural dichords)

1. (music) A chord with two notes.
   • 1981, Robert Fink, The Origin of Music: A Theory of the Universal Development of Music:

     This in turn may lead to splitting the final note of the song into a dichord without the necessary existence of overlapping, but the dichord may be an interval of any kind, since it is melodically formed.

2. A musical instrument that has two sets of strings.
   • 1991, Cecil Adkins, A trumpet by any other name: a history of the trumpet marine:

     Many modern instrument collections contain instruments shaped like eighteenth-century trumpet marines, but which might better be described as dichords equipped with common string instrument bridges so as to be played as basses.

3. An ancient two-stringed lute.