FIDUCIAL
fiducial
(adjective) based on trust
fiducial
(adjective) used as a fixed standard of reference for comparison or measurement; “a fiducial point”
fiduciary, fiducial
(adjective) 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”
Source: WordNet® 3.1
Etymology
Adjective
fiducial (comparative more fiducial, superlative most fiducial)
Accepted as a fixed basis of reference.
Based on having trust.
Noun
fiducial (plural fiducials)
In manufacturing, a small mark on a circuit board used to align components, a fiducial point.
Source: Wiktionary
Fi*du"cial, a. Etym: [L. fiducia trust, confidence; akin to fides
faith. See Faith.]
1. Having faith or trust; confident; undoubting; firm. "Fiducial
reliance on the promises of God." Hammond.
2. Having the nature of a trust; fiduciary; as, fiducial power.
Spelman. Fiducial edge (Astron. & Surv.), the straight edge of the
alidade or ruler along which a straight line is to be drawn.
– Fiducial line or point (Math. & Physics.), a line or point of
reference, as for setting a graduated circle or scale used for
measurments.
Source: Webster’s Unabridged Dictionary 1913 Edition