having the lower jaw or mandible longer than the upper.
Origin of hypognathous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for hypognathous
Historical Examples of hypognathous
Hypognathous: having the mouth parts directed more or less vertically ventrad.Explanation of Terms Used in Entomology
John. B. Smith
having a lower jaw that protrudes beyond the upper jaw
(of insects) having downturned mouthparts
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Having a congenitally underdeveloped lower jaw.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.