Endosternite :: Endosternite (n.) The part of each apodeme derived from the intersternal membrane in Crustacea and insects.
Sternite :: Sternforemost (adv.) With the stern, instead of the bow, in advance; hence, figuratively, in an awkward, blundering manner..
Urosternite :: Urosternite (n.) The sternal, or under piece, of any one of the uromeres of insects and other arthropods..