philothion
/ˌfɪlə(ʊ)ˈθʌɪən/Biochemistry. Now historical
noun
A substance present in yeast and in some animal tissues and postulated to be responsible for the reduction of sulphur. Superseded by glutathione.
Origin
Late 19th century; earliest use found in Journal of the Chemical Society. From French philothion from philo- + ancient Greek θεῖον sulphur.