• synonyms


[fi-doo-shuh l, -dyoo-]
  1. accepted as a fixed basis of reference or comparison: a fiducial point; a fiducial temperature.
  2. based on or having trust: fiducial dependence upon God.
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Origin of fiducial

1565–75; < Late Latin fīdūciālis, equivalent to fīdūci(a) trust (akin to fīdere to trust) + -ālis -al1
Related formsfi·du·cial·ly, adverbun·fi·du·cial, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for fiducially

Historical Examples of fiducially

  • The adverb "fiducially" first brought to my notice, as the synonym of confidently, steadily.

    Personal Memoirs Of A Residence Of Thirty Years With The Indian Tribes On The American Frontiers

    Henry Rowe Schoolcraft

British Dictionary definitions for fiducially


  1. physics used as a standard of reference or measurementa fiducial point
  2. of or based on trust or faith
  3. law a less common word for fiduciary
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Derived Formsfiducially, adverb

Word Origin for fiducial

C17: from Late Latin fīdūciālis , from Latin fīdūcia confidence, reliance, from fīdere to trust
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for fiducially



1570s, from Latin fiducialis "reliable," from fiducia "trust" (see faith).

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Online Etymology Dictionary, © 2010 Douglas Harper