/ Dictionary / Index I isinglass: Meaning and Definition of Find definitions for: i•sin•glass Pronunciation: (ī'zun-glas", -gläs", ī'zing-), [key] — n. 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. mica, esp. in thin, translucent sheets. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: isinglass (Thesaurus) Isin Isis Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language