The Collaborative International Dictionary of English v.0.48:

Girdle \Gir"dle\, n. [OE. gurdel, girdel, AS. gyrdel, fr.
   gyrdan; akin to D. gordel, G. g["u]rtel, Icel. gyr?ill. See
   Gird, v. t., to encircle, and cf. Girth, n.]
   [1913 Webster]
   1. That which girds, encircles, or incloses; a circumference;
      a belt; esp., a belt, sash, or article of dress encircling
      the body usually at the waist; a cestus.
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            Within the girdle of these walls.     --Shak.
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            Their breasts girded with golden girdles. --Rev. xv.
                                                  6.
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   2. The zodiac; also, the equator. [Poetic] --Bacon.
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            From the world's girdle to the frozen pole.
                                                  --Cowper.
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            That gems the starry girdle of the year. --Campbell.
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   3. (Jewelry) The line ofgreatest circumference of a
      brilliant-cut diamond, at which it is grasped by the
      setting. See Illust. of Brilliant. --Knight.
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   4. (Mining) A thin bed or stratum of stone. --Raymond.
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   5. (Zool.) The clitellus of an earthworm.
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   Girdle bone (Anat.), the sphenethmoid. See under
      Sphenethmoid.

   Girdle wheel, a spinning wheel.

   Sea girdle (Zool.), a ctenophore. See Venus's girdle,
      under Venus.

   Shoulder, Pectoral, & Pelvic, girdle. (Anat.) See
      under Pectoral, and Pelvic.

   To have under the girdle, to have bound to one, that is, in
      subjection.
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The Collaborative International Dictionary of English v.0.48:

Pelvic \Pel"vic\, a.
   Of, pertaining to, or in the region of, the pelvis; as,
   pelvic cellulitis.
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   Pelvic arch, or Pelvic girdle (Anat.), the two or more
      bony or cartilaginous pieces of the vertebrate skeleton to
      which the hind limbs are articulated. When fully ossified,
      the arch usually consists of three principal bones on each
      side, the ilium, ischium, and pubis, which are often
      closely united in the adult, forming the innominate bone.
      See Innominate bone, under Innominate.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pelvic
    adj 1: of or relating to the pelvis; "pelvic exam"; "pelvic
           inflammation"