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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.
References in periodicals archive ?
Before plating the cells, two parallel lines were drawn at the underside of the wells to serve as fiducially marks demarcating the wound areas to be analyzed.
With O-arm 3D images guidance, the reference fiducially markers can sometimes change due to respiratory movements and elasticity of the surgical table when using a probe to detect the trajectory of the screws.
Equation (23) also fiducially describes the dynamics deep inside radiation or matter dominated (MD) eras separately.