femur

/ˈfimər/

/ˈfimə/

Other forms: femora; femurs

Your femur is the large bone inside your thigh. The femur is the strongest bone in the human body.

In between your knee and hip joints is your femur, the only bone in the upper part of your leg. The femur isn't just strong, but is also the longest of your bones. Four-legged animals have femurs as well. When this word was originally used in English, it was an architectural term. In Latin, femur means "thigh" or "thighbone."

Definitions of femur

1. noun

   the longest and thickest bone of the human skeleton; extends from the pelvis to the knee
   synonyms: femoris, thighbone

   type of:

   leg bone

   a bone of the leg