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
Hipbone is one word.
The proper name for the hipbone is the coxal bone or os coxae.
Pelvis.
Pelvis.
hipster
Iliac is the medical term meaning area around the hipbone.
At the hip/pelvis
coxal
Vertebrae.
Os Coxae
liver