1. the bone of the upper leg extending from the hip to the knee; the femur

Examples

• The doctor said she had fractured her thighbone in the fall.
• The thighbone is the longest and strongest bone in the human body.
• X-rays revealed a crack in the patient’s thighbone.
• The archaeologist carefully excavated the ancient thighbone from the burial site.
• Physical therapy helped strengthen the muscles around his healing thighbone.
• The thighbone connects the hip joint to the knee joint.