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The Collaborative International Dictionary
Endosternite

Endosternite \En`do*ster"nite\, n. [Endo- + sternum.] (Zo["o]l.) The part of each apodeme derived from the intersternal membrane in Crustacea and insects. [1913 Webster] ||

Wiktionary
endosternite

n. (context zoology English) The part of each apodeme derived from the intersternal membrane in crustaceans and insects.