What is a femure?

Answer 1

Between your knee and hip. It is also the longest bone in you body. By Jens Radda
It is the top bone in the leg.
femurs are the biggest bones in the body which are in your leg and also in Egypt they needed big femurs to make pyramids and stuff
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Answer 2

You must mean "femur," which is "the longest and thickest bone of the human skeleton; extends from the pelvis to the knee" (Word Web); apparently some folks choose to spell it "femure" but that's not in the dictionary.