/ Thesaurus / O Synonyms of ostwald's theory of indicators Find synonyms for: Noun1. theory of indicators, Ostwald's theory of indicators, scientific theoryusage: (chemistry) the theory that all indicators are either weak acids or weak bases in which the color of the ionized form is different from the color before dissociationWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language