from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Having receding jaws.
from The Century Dictionary and Cyclopedia
- In anthropology, having retreating jaws or teeth: the opposite of prognathous.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. having receding jaws
Greek opistho-, behind (from opisthen; see epi in Indo-European roots) + -gnathous.(American Heritage® Dictionary of the English Language, Fourth Edition)