pedal

1. A lever operated by one's foot that is used to control or power a machine or mechanism, such as a bicycle or piano

   A piano usually has two or three pedals.

2. A foot or footlike part.
3. An effects unit, especially one designed to be activated by being stepped on.
4. (equestrian) A stirrup.
5. The ranks of pipes played from the pedal-board of an organ.

   A small organ commonly has only one or two ranks on the pedal.

1. To operate a pedal attached to a wheel in a continuous circular motion.

   to pedal one's loom

2. To operate a bicycle.

   He was out of breath from pedalling up the steep hill.

adjective

Of or relating to the foot.