fiducial

adjectives

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"
fiducial, fiduciary
pertains to
trust
used as a fixed standard of reference for comparison or measurement
"a fiducial point"
fiducial
pertains to
standard
domain category
the science of matter and energy and their interactions
"his favorite subject was physics"
natural philosophy, physics
based on trust
fiducial
is similar to
worthy of trust or belief
"a trustworthy report"; "an experienced and trustworthy traveling companion"
trustworthy, trusty