isinglass

American  

[ahy-zuhn-glas, -glahs, ahy-zing-] / ˈaɪ zənˌglæs, -ˌglɑs, ˈaɪ zɪŋ- /

noun

1. a pure, transparent or translucent form of gelatin, obtained from the air bladders of certain fish, especially the sturgeon: used in glue and jellies and as a clarifying agent.

2. mica, especially in thin, translucent sheets.

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isinglass British  

/ ˈaɪzɪŋˌɡlɑːs /

noun

1. a gelatine made from the air bladders of freshwater fish, used as a clarifying agent and adhesive

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isinglass Scientific  

/ ī′zən-glăs′,ī′zĭng- /

1. A transparent, almost pure gelatin prepared from the inner membrane of the swim bladder of the sturgeon and certain other fishes. It is used as an adhesive and a clarifying agent.

2. Mica, especially in the form of the mineral muscovite.

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Etymology

Origin of isinglass

1535–45; < Middle Dutch huysenblase (with glass for blase by folk etymology), literally, sturgeon bladder; cognate with German Hausenblase