- 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. 2018
Examples from the Web for 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
- 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.