What is "hip bone"

Hip \Hip\, n. [OE. hipe, huppe, AS. hype; akin to D. heup, OHG. huf, G. h["u]fte, Dan. hofte, Sw. h["o]ft, Goth. hups; cf. Icel. huppr, and also Gr. ? the hollow above the hips of cattle, and Lith. kumpis ham.]

1. The projecting region of the lateral parts of one side of the pelvis and the hip joint; the haunch; the huckle.

2. (Arch.) The external angle formed by the meeting of two sloping sides or skirts of a roof, which have their wall plates running in different directions.

3. (Engin) In a bridge truss, the place where an inclined end post meets the top chord.
   --Waddell.

   Hip bone (Anat.), the innominate bone; -- called also haunch bone and huckle bone.

   Hip girdle (Anat.), the pelvic girdle.

   Hip joint (Anat.), the articulation between the thigh bone and hip bone.

   Hip knob (Arch.), a finial, ball, or other ornament at the intersection of the hip rafters and the ridge.

   Hip molding (Arch.), a molding on the hip of a roof, covering the hip joint of the slating or other roofing.

   Hip rafter (Arch.), the rafter extending from the wall plate to the ridge in the angle of a hip roof.

   Hip roof, Hipped roof (Arch.), a roof having sloping ends and sloping sides. See Hip, n., 2., and Hip, v. t., 3.

   Hip tile, a tile made to cover the hip of a roof.

   To catch upon the hip, or To have on the hip, to have or get the advantage of; -- a figure probably derived from wresting.
   --Shak.

   To smite hip and thigh, to overthrow completely; to defeat utterly.
   --Judg. xv. 8.

alt. (context skeleton English) One of the two bones that form the sides of the pelvis. n. (context skeleton English) One of the two bones that form the sides of the pelvis.

The hip bone (innominate bone, pelvic bone or coxal bone) is a large flat bone, constricted in the center and expanded above and below. In some vertebrates (including humans before puberty) it is composed of three bones: the ilium, ischium, and the pubis.

The two hip bones join at the pubic symphysis and together with the sacrum and coccyx (the pelvic part of the spine) comprise the skeletal component of the pelvis – the pelvic girdle which surrounds the pelvic cavity. They are connected to the sacrum, which is part of the axial skeleton, at the sacroiliac joint. Each hip bone is connected to the corresponding femur (thigh bone) (forming the primary connection between the bones of the lower limb and the axial skeleton) through the large ball and socket joint of the hip.