/thuy/ , n.
1. the part of the lower limb in humans between the hip and the knee.
2. the corresponding part of the hind limb of other animals; the femoral region.
3. (in birds)
a. the true femoral region that is hidden by the skin or feathers of the body.
b. the segment below, containing the fibula and tibia.
4. Entomol. the femur.
[ bef. 900; ME thi, thigh ( e ), the ( h ), OE thioh, theoh; c. D dij, OHG dioh, ON thjo ]