trea·dle /ˈtrɛdḷ/
踏木,踏板(vi.)踏動踏板,開動
Trea·dle n.
1. The part of a foot lathe, or other machine, which is pressed or moved by the foot.
2. Biol. The chalaza of a bird's egg; the tread.
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treadle
n : a lever that is operated with the foot [syn: pedal, foot
pedal, foot lever]
v 1: tread over; "the brickmaker treadles over clay to pick out
the stones"
2: operate (machinery) by a treadle