ommatin
/ˈɒmətɪn/(also ommatine) Biochemistry
noun
Any of the group of ommochromes characterized by weaker colours, lower stability to alkalis, and lower molecular weights than ommins.
Origin
1940s; earliest use found in Biological Abstracts. From German Ommatin from ancient Greek ὄμματ-, ὄμμα eye + German -in.