Fi*du"cial (?), a. [L. fiducia trust, confidence; akin to fides faith. See Faith.]
Having faith or trust; confident; undoubting; firm.
reliance on the promises of God."
Having the nature of a trust; fiduciary; as, fiducial power.
Fiducial edge Astron. & Surv., the straight edge of the alidade or ruler along which a straight line is to be drawn. -- Fiducial line ∨ point Math. & Physics., a line or point of reference, as for setting a graduated circle or scale used for measurments.
© Webster 1913.