- pelvis, pelvic girdle, pelvic arch, hip - the structure of the vertebrate skeleton supporting the lower limbs in humans and the hind limbs or corresponding parts in other vertebrates
--1 is a kind of girdle
--1 is a part of appendicular skeleton
--1 has parts:coccyx, tail bone; hipbone, innominate bone; ilium; ischium, ischial bone, os ischii; pubis, pubic bone, os pubis; sacrum; hip, hip joint, coxa, articulatio coxae - pelvis, renal pelvis - a structure shaped like a funnel in the outlet of the kidney into which urine is discharged before passing into the ureter
--2 is a kind of cavity, bodily cavity, cavum
--2 is a part of kidney