Pronunciation: (kärt'hwēl", -wēl"),[key] —n. 1. the wheel of a cart.
2. an acrobatic feat in which a person starts from a standing position, with arms extended, and wheels the body sideways, landing first on the hands and then on the feet and usually repeating this in a series.
3. Slang.any large coin, esp. a U.S. silver dollar.
4. Slang.an amphetamine tablet.
—v.i. to roll forward end over end: The skier took a sudden spill and cartwheeled down the slope.