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 (fĭ-do͞o′shəl, -dyo͞o′-, fī-)
1. Based on or relating to faith or trust.
2. Relating to or characteristic of a legal trust; fiduciary.
3. Regarded or employed as a standard of reference, as in surveying.

[Late Latin fīdūciālis, from Latin fīdūcia, trust, from fīdere, to trust; see bheidh- in Indo-European roots.]

fi·du′cial·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (General Physics) physics used as a standard of reference or measurement: a fiducial point.
2. of or based on trust or faith
3. (Law) law a less common word for fiduciary
[C17: from Late Latin fīdūciālis , from Latin fīdūcia confidence, reliance, from fīdere to trust]
fiˈducially adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(fɪˈdu ʃəl, -ˈdyu-)

1. accepted as a fixed basis of reference or comparison: a fiducial point.
2. based on or having trust: fiducial dependence upon God.
[1565–75; < Late Latin fīdūciālis= Latin fīdūci(a) trust (akin to fīdere to trust) + -ālis -al1]
fi•du′cial•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.fiducial - relating to or of the nature of a legal trust (i.e. the holding of something in trust for another); "a fiduciary contract"; "in a fiduciary capacity"; "fiducial power"
2.fiducial - used as a fixed standard of reference for comparison or measurement; "a fiducial point"
natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
3.fiducial - based on trust
trustworthy, trusty - worthy of trust or belief; "a trustworthy report"; "an experienced and trustworthy traveling companion"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Fiducial markers sales are anticipated to surpass 100 Mn by 2019, registering an upswing from 93.9 Mn in 2018, according to a Fact.MR study.
[ClickPress, Tue Apr 09 2019] Fact.MR has published a new research report on fiducial markers market a new study of the fiducial markers market and published a report based on the forecast and trend analysis of the fiducial markers market for the forecast period of 2018 to 2028.
In this way, the proposed ECG anonymisation method proved to be able to conceal fiducial and non-fiducial features for both normal and abnormal ECG signals.
the Frixione isolation with 0.5 < n < 2, [E.sup.max.sub.T] = 11 GeV, and R = 0.4 (see (5)), and the following fiducial cuts:
The metallic fiducial was selected as the center of the tumor and the iso-center of radiation fields for the phantom.
Farzad et al [4] focused the detection the specific fiducial points of the Seismocardiogram (SCG) signal with or without using the Electrocardiogram (ECG) R-wave as the reference point.
A fiducial is essentially an alignment mark used by surface-mount assembly machines.
Accuracy of the 3D anatomic map registration (i.e., image registration between the initial CT from which the 3D anatomic map was generated and the final needle tip position based on the coregistration of anatomic landmarks such as the carina or major vascular structures and fiducial markers placed on the skin) was determined using final needle tip position on the final conformational CT compared to the expected location of the needle tip based on the 3D model.
We made statistics to the results of fiducial net reliability analysis as shown in Table 5.
The concentrations causing 50% ([LC.sub.50]) and 95% response ([LC.sub.95]) and the 95% fiducial limits were determined by probit analysis using PoloPC (LeOra software 1987).
Image-guided urologic interventions for prostate cancer include diagnostic biopsies, fiducial marker placements for external beam radiation, ultrasound-guided and primary ablative therapies, and fluid collection drainages.
Implanting gold fiducial markers around a tumor is an important procedure for the planning and aiming of CyberKnife radiation therapy.