The Collaborative International Dictionary
Synosteoses
Synosteosis \Syn*os`te*o"sis\, n.; pl. Synosteoses. [NL., fr. Gr. sy`n with + ? bone.] (Anat.) Union by means of bone; the complete closing up and obliteration of sutures.
Wiktionary
synosteoses
n. (plural of synosteosis English)