In back and in the central line.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for posteromedian
Historical Examples of posteromedian
One specimen has a posteromedian spine on the median digital ossification (Fig. 16).The Baculum in Microtine Rodents
Thus, in those species the posteromedian portion of the sphenethmoid is obscured, and the lateral margins are partly exposed.