adj, noun ·Uncommon ·Advanced level

Definitions

Noun

1. 1
   In photography, a familiar reference object used to show size or scale, such as a ruler or a coin; a fiducial marker.
2. 2
   In manufacturing, a small mark on a circuit board used to align components; a fiducial point.

Adjective

1. 1
   Accepted as a fixed basis of reference.

   "Rulers and coins make good fiducial markers in photographs."

2. 2
   Based on having trust.

Adjective

1. 1
   based on trust wordnet
2. 2
   used as a fixed standard of reference for comparison or measurement wordnet
3. 3
   relating to or of the nature of a legal trust (i.e. the holding of something in trust for another) wordnet

Synonyms

All synonyms

fiduciarybalancedconvictionalcoolfastfiducially

Example

More examples

"Rulers and coins make good fiducial markers in photographs."

Etymology

From Late Latin fīdūciālis, from fīdūcia (“trust, reliance”) + -ālis, from fīdō (“I trust”).

Related phrases

fiducial point

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.