-ostosis
noun combining form
(plural -ostoses or -ostosises)
hyperostosis
noun combining form
(plural -ostoses or -ostosises)
 ETYMOLOGY  New Latin, from Greek -ostōsis, from osteon bone — more at osseous
: ossification of a (specified) part or to a (specified) degreehyperostosis
-os·to·sis
\ˌäˈstōsə̇s\  noun combining form 
(plural -osto·ses or -ostosises \-ōˌsēz\) 
Etymology: New Latin, from Greek -ostōsis, from osteon bone + -ōsis -osis 
 : ossification of a (specified) part or to a (specified) degree 
< hyperostosis >
< ectostosis >
< hyperostosis >
< ectostosis >