The Collaborative International Dictionary
Lophosteon
Lophosteon \Lo*phos"te*on\, n.; pl. L. Lophostea, E. Lophosteons. [NL., from Gr. lo`fos a crest + ? a bone.] (Anat.) The central keel-bearing part of the sternum in birds.
Wiktionary
lophosteon
n. (context anatomy English) The central keel-bearing part of the sternum in birds.