Pronunciation: (tred'l), [key]
—n., v., -dled, -dling.
1. a lever or the like worked by continual action of the foot to impart motion to a machine.
2. a platform, as on a bus or trolleycar, for opening an exit door.
to work a treadle.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.