fiducial.
Accepted as a fixed basis of reference.
Meaning & usage
Accepted as a fixed basis of reference.
Rulers and coins make good fiducial markers in photographs.
Based on having trust.
Where this word comes from
From Late Latin fīdūciālis, from fīdūcia (“trust, reliance”) + -ālis, from fīdō (“to trust”).
In photography, a familiar reference object used to show size or scale, such as a ruler or a coin; a fiducial marker.
In manufacturing, a small mark on a circuit board used to align components; a fiducial point.
A pattern used in a QR code or similar to aid the electronic reader with determining its alignment.
Where this word comes from
From Late Latin fīdūciālis, from fīdūcia (“trust, reliance”) + -ālis, from fīdō (“to trust”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.