1. based on trust or confidence; involving a relationship of trust
Usage: formal; legal
2. serving as a reference point or standard for measurement or comparison
Usage: technical; scientific

Examples

• The lawyer had a fiducial duty to act in his client’s best interests.
• Banks must maintain fiducial responsibility when managing customer accounts.
• The survey team placed fiducial markers at precise locations.
• Scientists used fiducial points to calibrate their measuring instruments.
• The trustee’s fiducial obligations required careful investment decisions.
• Fiducial standards ensure accuracy in scientific measurements.