/ Thesaurus / F Synonyms of fluorescein isocyanate Find synonyms for: Noun1. fluorescein isothiocyanate, fluorescein isocyanate, fluorochromeusage: a fluorochrome commonly conjugated with antibodies for use in indirect immunofluorescenceWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language