pelvic girdle

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A bony or cartilaginous structure in vertebrates, attached to and supporting the hind limbs or fins. Also called pelvic arch.

The paired coxal (hip) bones plus the sacrom that attach the lower limbs to the axial skeleton. The pelvic girdle can move in all three planes to optimize the positioning of the hip joint. Movements of the girdle also coordinate with certain movements of the spine.

A bony or cartilaginous structure in vertebrates, attached to and supporting the hind limbs or fins. Also called pelvic arch.

The noun has one meaning:

Meaning #1: the structure of the vertebrate skeleton supporting the lower limbs in humans and the hind limbs or corresponding parts in other vertebrates
  Synonyms: pelvis, pelvic girdle, hip