The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
a type of palate structure characteristic of sparrows and martins. Aegithognathism is a variation on neognathism. In aegithognathism the palatal processes of the maxillary bones do not fuse to each other or to the vomer.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.