The Latin word [femur] means "thigh". the femur is the bone of the thigh, and this is why the anatomical region of the thigh is known as the "femoral region".
The femur is a long bone and has several anatomical characteristics such as a head (which articulates with the pelvic bone), a neck, a small and a large trochanter, and two condyles for articulation with the tibia at the knee joint.
For a detailed description of the anatomy of the femur, click here. Click on the image for a larger view.