F major sharp eleventh (lydian) piano chord - Fmaj9#11
The F major sharp eleventh (lydian) chord is a 6-note chord consisting of the notes F, A, C, E, G and B.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Fmaj9#11.
Interactive piano diagram for the F major sharp eleventh (lydian) chord
Chords that are a subset of Fmaj9#11. These contain less notes but all of them are included in Fmaj9#11.