Treadle
Treadle , noun
[Old English tredyl a step, Anglo-Saxon tredel. See Tread.]
1.
The part of a foot lathe, or other machine, which is pressed or moved by the foot.
2.
(Biology) The chalaza of a bird's egg; the tread.
Treadle , noun
[Old English tredyl a step, Anglo-Saxon tredel. See Tread.]