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.-of or pertaining to a pedal; having pedals.-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 pedal curve or surface.