The Collaborative International Dictionary of English v.0.48:
Ichthyosis \Ich`thy*o"sis\, n. [NL., fr. Gr. 'ichqy`s fish.] (Med.) A disease in which the skin is thick, rough, and scaly; -- called also fishskin. -- Ich`thy*ot"ic, a. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Fishskin \Fish"skin`\, n. 1. The skin of a fish (dog fish, shark, etc.) [1913 Webster] 2. (Med.) See Ichthyosis. [1913 Webster]