ichthyism

noun
ich·​thy·​ism | \ ˈik-thē-ˌiz-əm How to pronounce ichthyism (audio) \
variants: or ichthyismus \ ˌik-​thē-​ˈiz-​məs How to pronounce ichthyismus (audio) \
plural ichthyisms or ichthyismuses

Medical Definition of ichthyism