Adjective: fiducial fi'doo-shul or fI'doo-shul
- (physics) used as a fixed standard of reference for comparison or measurement
"a fiducial point"
- Relating to or of the nature of a legal trust (i.e. the holding of something in trust for another)
"fiducial power";
- fiduciary
- Based on trust
"The fiducial relationship between lawyer and client is protected by law"
See also: straight-up [informal], trustable, trustworthy, trusty
Encyclopedia: Fiducial