pelvis

pelvis is a   Noun

Definition:

[1] The pelvic arch, or the pelvic arch together with the sacrum. See Pelvic arch, under Pelvic, and Sacrum.

[2] The calyx of a crinoid. Pelvis of the kidney (Anat.), the basinlike cavity into which the ureter expands as it joins the kidney.

Synonyms: