Definition of "fiducial" [fi•du•cial]

• Based on or relating to faith or trust. (adjective)
• Relating to or characteristic of a legal trust; fiduciary. (adjective)
• Regarded or employed as a standard of reference, as in surveying. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Yes. marker = printed icon or glyph, also known as a fiducial"
• "From the fiducial points, stable features were computed that characterize the uniqueness of an individual."
• "There is a twofold fiducial trust; -- one whereby we trust in Christ for the forgiveness of sin; which you may call adherence."