also: アイジングラス · アイシンググラス
isinglass; fish-bladder gelatin
A type of gelatin obtained from the swim bladders of fish, used historically as a clarifying agent in brewing and winemaking, and in cooking. The term is a direct loanword from English.
Isinglass is sometimes used as a clarifying agent for beer.
Traditional recipes use isinglass instead of gelatin.