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Webster 1913 Edition

Isinglass

I′sin-glass

,
Noun.
[Prob. corrupted fr. D.
huizenblas
(akin to G.
hausenblase
), lit., bladder of the huso, or large sturgeon;
huizen
sturgeon +
blas
bladder. Cf.
Bladder
,
Blast
a gust of wind.]
1.
A semitransparent, whitish, and very pure form of gelatin, chiefly prepared from the sounds or air bladders of various species of sturgeons (as the
Acipenser huso
) found in the rivers of Western Russia. It used for making jellies, as a clarifier, etc. Cheaper forms of gelatin are not unfrequently so called. Called also
fish glue
.
2.
(Min.)
A popular name for mica, especially when in thin sheets.

Webster 1828 Edition

Isinglass

I'SINGLASS

,
Noun.
i'zinglass. [that is, ise or ice-glass.]
A substance consisting chiefly of gelatin, of a firm texture and whitish color, prepared from the sounds or air-bladders of certain fresh water fishes, particularly of the huso, a fish of the sturgeon kind, found in the rivers of Russia. It is used as an agglutinant and in fining wines.

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