Definition of "handrest"

The wooden handrest is placed over the vibration unit , with the post protruding through the hole in the handrest.

1996, Robert W. Amler, Michael Gibertini, Pediatric Environmental Neurobehavioral Test Battery, page 146

Pull on the handrest to ease the bassoon into a more comfortable position.

2013, Peter Neville, Tales from the Pit

Adam presses several keys on the other handrest with his left hand as he continues to pound away on a button with his right.

2018, Matthew Bok, The Adam Carter Saga, page 249