From Longman Dictionary of Contemporary Englishfoot pedal/brake/pump etcfoot pedal/brake/pump etcTa machine or control that you operate using your feet → foot
Examples from the Corpus
foot pedal/brake/pump etc• I also use a Boogie and split the signal from a foot pedal to two amps usually.• He then, with a foot pedal, activates the wire-cutter.• I hear the rat-ta-ta-tat of the foot pedal, as she stitches along.• The amount of push, and therefore the direction the nose points, is controlled by pushing the foot pedals. 