phimosis
noun
phi·mo·sis
| \ fī-ˈmō-səs
, fi-
\
, fi-
\
plural phimoses\ -ˌsēz
\
\
Medical Definition of phimosis
: tightness or constriction of the orifice of the foreskin arising either congenitally or postnatally (as from balanoposthitis) and preventing retraction of the foreskin over the glans