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Hanger
From WikiPedalia
This term has several bicycle applications:
- A derailer hanger is the part of a rear dropout to which the rear derailer attaches. It is also another name for an adaptor claw.
Dropout with built-in hanger Plain dropout Plain dropout with adapter claw 
- A cable hanger is a bolt-on cable stop used with centerpull or cantilever brakes. The front cable hanger is secured by the headset, the rear attaches to the seatpost bolt.
- A chain hanger is a small braze-on mounted on the inside of the right seat stay. When the rear wheel is not installed in the frame, the chain may be routed over this fitting to keep it from flopping around.
- "Hanger" is also an old-fashioned American synonym for "bottom bracket."
