/ Dictionary / Index F fulminic acid: Meaning and Definition of Find definitions for: fulmin'ic ac'id Pronunciation: [key] an unstable acid, CNOH, isomeric with cyanic acid, and known only in the form of its salts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fulminic fulness Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language