Pedal (pēd&aitalic_;l in def 1; 277), a. [L. pedalis, fr. pes, pedis, foot. See Foot, and cf. Pew.] 1. Of or pertaining to the foot, or to feet, literally or figuratively; specifically (Zoöl.), pertaining to the foot of a mollusk; as, the pedal ganglion.
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2. (p&ebreve_;d"&aitalic_;l) Of or pertaining to a pedal; having pedals.
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Pedal curve or Pedal surface (Geom.), the curve or surface which is the locus of the feet of perpendiculars let fall from a fixed point upon the straight lines tangent to a given curve, or upon the planes tangent to a given surface. -- Pedal note (Mus.), the note which is held or sustained through an organ point. See Organ point, under Organ. -- Pedal organ (Mus.), an organ which has pedals or a range of keys moved by the feet; that portion of a full organ which is played with the feet.
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