Pedal

a.	1.	(Zool.) 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.
	2.	Of or pertaining to a pedal; having pedals. Pedal curve (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.
n.	1.	(Mech.) 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.
	2.	(Geom.) A pedal curve or surface.

Noun	1.	pedal - a sustained bass note Synonyms: pedal point
	2.	pedal - a lever that is operated with the foot Synonyms: foot lever, foot pedal, treadle
Verb	1.	pedal - ride a bicycle Synonyms: bicycle, bike, cycle, wheel
	2.	pedal - operate the pedals on a keyboard instrument
Adj.	1.	pedal - of or relating to the feet; "the word for a pedal extremity is `foot'"

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