Noun
thighbone (plural thighbones)
(anatomy) The bone that extends from the pelvis to the knee in humans; the femur.
In a new development, on 19 June 2014, Mubarak slipped in the bathroom at the military hospital in Cairo where he is being held and broke his left leg, also fracturing his left thighbone, requiring surgery. Source: Internet
One student did find some remains: a Dutchman named Eugène Dubois searched the East Indies from 1887 to 1895, discovering the remains of Java Man in 1891, consisting of a skullcap, thighbone, and a few teeth. Source: Internet