ichthyosis hystrix gravior
noun
ichthyosis hys·trix gra·vi·or
| \ -ˈhis-triks-ˈgrav-ē-ˌȯr
, -ˈgräv-
\
, -ˈgräv-
\
Medical Definition of ichthyosis hystrix gravior
: a rare hereditary disease characterized by the formation of brown, verrucose, and often linear lesions of the skin