retrognathism

[ rĕt′rō-năthĭz′əm ]

n.

A condition of facial disharmony in which one or both jaws are posterior to their normal positions.

Related forms

ret′ro•gnathic adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.