Pedal

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Pedal

(a.) Of or pertaining to the foot, or to feet, literally or figuratively; specifically (Zool.), pertaining to the foot of a mollusk; as, the pedal ganglion.
(a.) Of or pertaining to a pedal; having pedals.
(a.) A lever or key acted on by the foot, as in the pianoforte to raise the dampers, or in the organ to open and close certain pipes; a treadle, as in a lathe or a bicycle.
(a.) A pedal curve or surface.