Genu and Hinge joint

Genu noun - Hinge joint in the human leg connecting the tibia and fibula with the femur and protected in front by the patella.

Hinge joint and genu are semantically related. In some cases you can use "Hinge joint" instead a noun "Genu".

Hinge joint noun - A freely moving joint in which the bones are so articulated as to allow extensive movement in one plane.

Genu and hinge joint are semantically related. Sometimes you can replace term "Genu" with "Hinge joint", this terms are similar.