The pelvic arch, or the pelvic arch together with the sacrum. See Pelvic arch, under Pelvic, and Sacrum.
- A basin-shaped structure of the vertebrate skeleton, composed of the innominate bones on the sides, the pubis in front, and the sacrum and coccyx behind, that rests on the lower limbs and supports the spinal column.
- The cavity formed by this structure.
- The hollow funnel in the outlet of the kidney, into which urine is discharged before entering the ureter. Also called renal pelvis.