The "genu-" in "genuflect" (4)

I believe the answer is:

knee

(Other definitions for knee that I've seen before include "Wounded in Indian Wars action" , "Where the femur meets the tibia" , "Hinge between the thigh and the shin" , "Thigh/shin connector" , "This is capped by the patella" .)

I've seen this clue in the LA Times.

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