mesenchyme, mesenchyma n. [Gr. mesos, middle; en-chyma, infusion] Embryonic connective tissue derived primarily from mesoderm and consisting of a diffuse network of loosely connected or scattered cells not segregated into layers or blocks.
mesenteron n. [Gr. mesos, middle; enteron, gut] The midgut or midportion of the alimentary tract, endodermal in origin; ventriculus; midintestine.
mesenteron rudiments (ARTHRO: Insecta) Groups of em-bryologic endodermal cells that regenerate the midgut (stomach) including the anterior and posterior; becomes the epithelium of the adult mesenteron.
mesentery n. [Gr. mesos, middle; enteron, gut] A supporting membrane or one that forms a partition.
mesepimeral scale or seta (ARTHRO: Insecta) Any scale or seta borne on the mesepimeron.
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