femur: Meaning and Definition of

fe•mur

1. a bone in the human leg extending from the pelvis to the knee, that is the longest, largest, and strongest in the body; thighbone. See diag. under
2. a corresponding bone of the leg or hind limb of an animal.
3. the third segment of the leg of an insect (counting from the base), situated between the trochanter and the tibia. See diag. under