Sacral kyphosis
Kyphosis sacralis
Definition
The sacral kyphosis (pelvic curve) begins at the sacrovertebral articulation, and ends at the point of the coccyx; its concavity is directed downward and forward.
References
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).