Dictionary

isinglass

noun isin·glass \ˈī-zən-ˌglas, ˈī-ziŋ-\

Definition of ISINGLASS

1
:  a semitransparent whitish very pure gelatin prepared from the air bladders of fishes (as sturgeons) and used especially as a clarifying agent and in jellies and glue
2
:  mica especially when in thin transparent sheets; especially :  muscovite 2

Origin of ISINGLASS

probably by folk etymology from obsolete Dutch huizenblas, from Middle Dutch huusblase, from huus sturgeon + blase bladder
First Known Use: 1535

Other Mineralogy Terms

agate, host, inclusion, matrix, streak

isinglass

noun isin·glass \ˈīz-ən-ˌglas, ˈī-ziŋ-\   (Medical Dictionary)

Medical Definition of ISINGLASS

1
:  a semitransparent whitish very pure gelatin prepared 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

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