A wheel used to drive a mill; a water-wheel.(noun)
The Century Dictionary (Public Domain)
Use "mill-wheel" in a sentence
"Mimic water was dropping off a mill-wheel under the clock."
"I squirmed up the lade among the slippery green slime till I reached the mill-wheel."
"An automaton he certainly is; a machine working independently of his control, the heart, like the mill-wheel, keeping all in motion, and the consciousness, like a person shut in the mill garret, enjoying the view out of the window and shaken by the thunder of the stones; an automaton in one corner of which a living spirit is confined: an automaton like man."