Polychord
（重定向自Bichord）
![Bitonal polychord: F major on top of C major.[1] Play](/Images/godic/202412/24/Polychord_C_major_and_F_major1943.png")
![Polychords: Em, EbM, EbM, and DM over Dm.[8] Play](/Images/godic/202412/24/Polychords_various_over_Dm1943.png")
![Separate chords within an extended chord.[9] Play](/Images/godic/202412/24/Thirteenth-polychord1944.PNG")
![Fred Steiner's 1957 Perry Mason theme,](/Images/godic/202412/24/Park_Avenue_Beat_polychord1944.png")
In music and music theory, a bichord or polychord consists of two or more chords, one on top of the other. In shorthand they are written with the top chord above a line and the bottom chord below, for example F above C: ![\frac{F}{C}](/Images/godic/202412/24/93464ea1be55aab5aa9c12a3600230b71944.png")
.
The use of polychords may suggest bitonality or polytonality. Harmonic parallelism may suggest bichords.