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]WordNet (r) 3.0 (2006):
ichthyosis n 1: any of several congenital diseases in which the skin is dry and scaly like a fish