spondylolisthetic pelvis

n.
  1. A pelvis whose brim is occluded to a greater or lesser degree by a forward dislocation of the body of the lower lumbar vertebra.Prague pelvis Rokitansky's pelvis
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.