Treadwheel

n.

1.

A wheel turned by persons or animals, by treading, climbing, or pushing with the feet, upon its periphery or face. See Treadmill.

Noun

1.

treadwheel - a mill that is powered by men or animals walking on a circular belt or climbing steps Synonyms: tread-wheel, treadmill

grinder, mill, tread-wheel, treadmill