The Collaborative International Dictionary
Pleurosteon
Pleurosteon \Pleu*ros"te*on\, n.; pl. L. Pleurostea, E. -ons. [NL., fr. Gr. ? a rib + ? a bone.] (Anat.) The antero-lateral piece which articulates the sternum of birds.
Wiktionary
pleurosteon
n. (context anatomy English) The anterolateral piece which articulates the sternum of birds.