/tum"breuhl/ , n.
1. one of the carts used during the French Revolution to convey victims to the guillotine.
2. a farmer's cart, esp. one for hauling manure, that can be tilted to discharge its load.
3. Obs. a two-wheeled covered cart accompanying artillery for carrying tools, ammunition, etc.
Also, tumbril .
[ 1275-1325; ME tumberell ducking stool tumberellus tumberel dump-cart, equiv. to tombe ( r ) to fall (see TUMBLE) + -rel -REL ]