Also found in: Medical.
n. pl. mes·o·gas·tri·a (-trē-ə)
Either of two mesenteries attached to the embryonic stomach that persist in the form of ligaments and the lesser omentum.
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.