The Collaborative International Dictionary
Endophragma
Endophragma \En`do*phrag"ma\, n. [NL., fr. Gr. 'e`ndon + fra`gma a fence.] (Zo["o]l.) A chitinous structure above the nervous cord in the thorax of certain Crustacea.
Wiktionary
endophragma
n. (context zoology English) A chitinous structure above the nervous cord in the thorax of certain crustaceans.