a pure, transparent or translucent form of gelatin, obtained from the air bladders of certain fish, esp. the sturgeon: used in glue and jellies and as a clarifying agent.
2.
mica, esp. in thin, translucent sheets.
Origin: 1535–45; < MD huysenblase (with glassfor blase by folk etym.), lit., sturgeon bladder; c. G Hausenblase
A transparent, almost pure gelatin prepared from the air bladder of the sturgeon and certain other fishes and used as an adhesive and a clarifying agent.
Mica in thin, transparent sheets.
[By folk etymology (influenced by glass) from obsolete Dutch huizenblas, from Middle Dutch hūsblase : hūs, sturgeon + blase, bladder; see bhlē- in Indo-European roots.]
1528, said to be perversion of Du. huysenblas, lit. "sturgeon bladder," from huysen "sturgeon" + blas "bladder;" so called because the substance was obtained from it.
Main Entry: isin·glass Pronunciation: 'Iz-&n-"glas, 'I-zi[ng]- Function: noun 1: a semitransparent whitish very pure gelatinprepared from the air bladders of fishes (as sturgeons) and used especially as a clarifying agent and in jellies and glue called also ichthyocolla 2:MICA