1A kind of gelatin obtained from fish, especially sturgeon, and used in making jellies, glue, etc., and for clarifying ale.‘The animal kingdom was represented by gelatin in the form of meat stock; isinglass; and hartshorn.’
- ‘Antonin poured the thickening isinglass alternately into the fruit juice and the almond milk.’
- ‘Sometimes the wood surface was prepared with a coating of gesso or isinglass diluted in water with a little white pigment added.’
- ‘Guinness uses isinglass, a form of gelatine made from fish bladders, in the production process to make the stout clearer.’
- ‘There is no evidence that isinglass is detrimental to health.’
- 1.1US Mica or a similar material in thin transparent sheets.
Mid 16th century alteration (by association with glass) of obsolete Dutch huysenblas ‘sturgeon's bladder’, from huysen ‘sturgeon’ + blas ‘bladder’.