/ Dictionary / Index F fiducial: Meaning and Definition of Find definitions for: fi•du•cial Pronunciation: (fi-d'shul, -dy'-), [key] — adj. accepted as a fixed basis of reference or comparison: a fiducial point; a fiducial temperature. based on or having trust: fiducial dependence upon God. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fiducial (Thesaurus) FIDO fiduciary Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language