Calm down, folks. Just words, and I think we all understood what he meant by "chord". There is a technically correct term for two notes played simultaneously (double stop also works for stringed instruments):
Of course, his instrument included a hundred or more voices, and several of them were on different octaves. So, I think one can say this was a "chord" by the general definition of "three or more notes from a key played simultaneously".
And, musicians do frequently refer to dyads as chords, as long as the third is there. The fifth has less harmonic weight (and never changes from major to minor) and the whole chord can be implied with just the first and the third. While pianists may mostly always have easy access to the fifth, stringed instrument players generally think of the fifth as the note you drop when you can't pick them all up.
http://en.wikipedia.org/wiki/Dyad_(music)
Of course, his instrument included a hundred or more voices, and several of them were on different octaves. So, I think one can say this was a "chord" by the general definition of "three or more notes from a key played simultaneously".
And, musicians do frequently refer to dyads as chords, as long as the third is there. The fifth has less harmonic weight (and never changes from major to minor) and the whole chord can be implied with just the first and the third. While pianists may mostly always have easy access to the fifth, stringed instrument players generally think of the fifth as the note you drop when you can't pick them all up.