Main Entry: fi·du·cial

Pronunciation: \fə-ˈdü-shəl, -ˈdyü-, fī-\

Function: adjective

Date: 1571

1 : taken as standard of reference <a fiducial mark>
2 : founded on faith or trust
3 : having the nature of a trust : fiduciary

— fi·du·cial·ly \-shə-lē\ adverb