Originally Posted by: zreynoldspPolychords are just 'more than one chord' chords.... :D
The most common use of them in Guitar is the 'slash' chords - playing one chord with a different note in the bass. Best example I can think of right now is playing an open C Major chord with the bass on G (Third fret of sixth string instead of third fret of fifth).
That's actually an inverted Cmajor. C in 2nd inversion.