fi·du·cial /fəˈduʃəl, ˈdju, faɪ-/
  (a.)基準的,根據信仰的,信託的
  Fi·du·cial a.
  1. Having faith or trust; confident; undoubting; firm. “Fiducial reliance on the promises of God.”
  2. 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 or  Fiducial point Math. & Physics., a line or point of reference, as for setting a graduated circle or scale used for measurments.
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  fiducial
       adj 1: 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" [syn: fiduciary]
       2: used as a fixed standard of reference for comparison or
          measurement; "a fiducial point"
       3: based on trust