資料來源 : Webster's Revised Unabridged Dictionary (1913)

Pedal \Pe"dal\, 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 (Zo["o]l.), pertaining to the
      foot of a mollusk; as, the pedal ganglion.

   2. Of or pertaining to a pedal; having pedals.

   {Pedal curve} or {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.