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An extension that is placed on one's knee which has a foot on the end of it. Used primarily when one is on crutches and the good leg gets tired from carrying the weight. You can place half your weight on your kneefoot. This is almost like having two working feet. Optional: wheel on bottom.
I was crutching around and my leg got tired, so I rested my bad leg on my kneefoot.
by Pysch_O April 19, 2010
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