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Having receding jaws or mouthparts directed backward.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
the condition of having retracted jaws. — opisthognathic, opisthognathous, adj.See also: Facial Features
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