• Webster's Revised Unabridged Dictionary
    • n Mesogaster (Anat) The fold of peritoneum connecting the stomach with the dorsal wall of the abdominal cavity; the mesogastrium.
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Century Dictionary and Cyclopedia
    • n mesogaster An inter mediate part of the intestine, extending from the pylorus to the cæcum, and including the small intestine with its annexes, as the liver and pancreas, also, in the fetus, the umbilical vesicle. It is commonly called the mid-gut.
    • n mesogaster [capitalized] A genus of fossil fishes.
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Webster's Revised Unabridged Dictionary
NL., fr. Gr. me`sos middle + belly