The Collaborative International Dictionary
entosternum
Entoplastron \En`to*plas"tron\, n.; pl. Entoplastra. [Ento- + plastron.] (Anat.) The median plate of the plastron of turtles; -- called also entosternum. [1913 Webster] ||
Wiktionary
entosternum
n. (context anatomy English) The entoplastron.