D defs.my
Entry 2 senses Webster, 1913

Treadle

· Trea·dle · IPA /ˈtɹɛdl̩/
01 n. The part of a foot lathe, or other machine, which is pressed or moved by the foot.
  1. 1.
    The part of a foot lathe, or other machine, which is pressed or moved by the foot.
  2. 2.
    The chalaza of a bird's egg; the tread.(Biol.)