treadwheel
treadwheel — noun
1. a big wheel that people or animals caused to spin by walking on its outer rim or
a big wheel that people or animals caused to spin by walking on its outer rim or climbing the steps attached to it; used in past centuries to run equipment such as grinding mills, lifting cranes, and pumps for water
At the museum, Eitan watched a demonstration of a replica treadwheel lifting heavy stone blocks.
passive use: treadwheel was used to lift / power
The old farm still had a treadwheel that powered a grain mill beside the river.
Prisoners in the 1800s were made to walk on a treadwheel as punishment.
Two men worked the treadwheel to pump water from a deep well.
Layla read that a horse on a treadwheel could turn a stone to grind wheat.
- treadmill
in modern usage, treadmill usually refers to the exercise machine, but historically the two terms overlapped
文法句型
a treadwheel
the treadwheel
用法筆記
A treadwheel is different from a treadmill: a treadmill has a moving belt you walk on while staying in place, whereas a treadwheel is a large wheel you push from the outside or from inside by walking or climbing.