Definition of "human knee" []

• Hinge joint in the human leg connecting the tibia and fibula with the femur and protected in front by the patella (noun)

WordNet. Princeton University. 2010.

• "I notice that at each place where an ash has been bent or cut it has grown stronger, swelling into a callous like a human knee or puckering into a bump of scar tissue round the little star-cracked crater of each amputated branch."