Pĕl'vis, n.

n. [Lat. pelvis, a basin, laver, allied to Gr. πέλις, πέλυς.] (Anat.) (a.) The open, bony structure at the lower extremity of the body, usually inclosing the internal urinary and genital organs, and always connecting the posterior members with the spine. It is formed by the two innominate bones, which form its sides, and by the sacrum behind. (b.) The cavity of the kidney into which the urine passes from the excretory tubuli.