It is referred to as the pelvic girdle. Boas and pythons are the only snakes that still have them, and that's where their spurs are connected to.
Another name for the Hipbone is the Pelvis
Pelvis.
hipster
Pelvis.
Iliac is the medical term meaning area around the hipbone.
The hipbone is composed of the ilium, ischium, and pubis. The ischium is the lowest and strongest structure among the three.
At the hip/pelvis
coxal
Pelvis
liver
Os Coxae
Vertebrae.