pelvis

This term refers to the basin-shaped complex of bones that supports the spinal column and protects the pelvic organs. It is used both in a strict anatomical sense to describe the skeletal structure and in a broader medical sense to describe the entire region of the lower torso. In medical contexts, the word is typically treated as a countable noun, though it refers to a single integrated system of bones. It is frequently paired with adjectives describing its shape or condition, such as pelvic tilt or pelvic floor.