| a pedal on a piano that when depressed with the foot raises the dampers and permits the strings to vibrate and sustain the tone. |
| reverberation pedal n. See sustaining pedal. |
| sus·tain·ing pedal (sə-stā'nĭng) n. The right pedal of a piano, which stops the action of the dampers and allows the strings to vibrate freely. Also called loud pedal, reverberation pedal. |