isinglass
Pronunciation:
/ˈaɪzɪŋɡlɑːs//ˈaɪzɪŋɡlæs/noun
Definitions
A form of gelatine obtained from the air bladder of the sturgeon and certain other fish, used as an adhesive and as a clarifying agent for wine and beer.
A thin, transparent sheet of mica (probably from its similarity to true isinglass).