exogastrula


Also found in: Medical.

exogastrula

[¦ek·sō′gas·trə·lə]
(embryology)
An abnormal gastrula that is unable to undergo invagination or further development because of a quantitative increase of presumptive endoderm.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.