The Collaborative International Dictionary
Mesenteron \Mes*en"te*ron\, n. [NL. See Meso-, and Enteron.] (Anat.) All that part of the alimentary canal which is developed from the primitive enteron and is lined with hypoblast. It is distinguished from the stomod[ae]um, a part at the anterior end of the canal, including the cavity of the mouth, and the proctod[ae]um, a part at the posterior end, which are formed by invagination and are lined with epiblast.
Wiktionary
n. (context anatomy English) The midgut.
Usage examples of "mesenteron".
Surprise lay off Mesenteron, moored in fifteen fathom water, pitching gently as she gazed at the harbour, a harbour silted up long since and now full of tree-trunks from the last flood of the river that meandered through the low-lying unhealthy town.
But if Captain Aubrey would give him a little notice before he next came to Mesenteron, there would be a magnificent review: Captain Aubrey would see a splendid body of men, devoted to the British cause, burning to see the downfall of the French, and perfectly equipped, except in the article of guns.
Malta and at Mesenteron Jack had not set foot on land for months, and his boots were killing him.