ˌ ̷ ̷ ̷ ̷ˈō.sə̇s noun
( plural ichthyo·ses -ōˌsēz)
Etymology: New Latin, from ichthy- + -osis
: a congenital disease usually of hereditary origin characterized by skin that is rough, thick, and scaly and resembles that of a fish — called also fishskin disease