ISINGLASSES
Noun
isinglasses
plural of isinglass
Source: Wiktionary
ISINGLASS
I"sin*glass, n. Etym: [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 from of gelatin, chiefly
prepared from the sounds or air bladders of various species of
sturgeons (as the Acipenser huso) found in the 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.)
Definition: A popular name for mica, especially when in thin sheets.
Source: Webster’s Unabridged Dictionary 1913 Edition