keratoma
noun
ker·a·to·ma
| \ ˌker-ə-ˈtō-mə
\
\
plural keratomas
also keratomata\ -mət-ə
\
\
Medical Definition of keratoma
1
: a hard thickened area of skin produced by hypertrophy of the horny layers : callus
2
: a tumorlike growth of horny tissue on the inner surface of the wall of a horse's hoof