fiducial

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UK/f(a)ɪˈdjuːʃ(ɪ)əl/UK/-ˈdʒuː-/UK/-uːs(ɪ)əl/US/fəˈd(j)uːʃəl/

adjective

Accepted as a fixed basis of reference.

“Rulers and coins make good fiducial markers in photographs.”

UncommonScrabble 14

Meanings

adjectivefiducial (comparative more fiducial, superlative most fiducial)

comparative more fiducial · superlative most fiducial

  1. Accepted as a fixed basis of reference.

    Rulers and coins make good fiducial markers in photographs.

  2. Based on having trust.
nounfiducial (plural fiducials)

plural fiducials

  1. In photography, a familiar reference object used to show size or scale, such as a ruler or a coin; a fiducial marker.
  2. In manufacturing, a small mark on a circuit board used to align components; a fiducial point.
  3. A pattern used in a QR code or similar to aid the electronic reader with determining its alignment.

Synonyms & antonyms

adjectiverelating to or of the nature of a legal trust (i.e. the holding of something in trust for another)

Similar

adjectivebased on trust

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Late Latinfīdūciālis
  2. Englishfiducial

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

Full word history & related roots →

Translations

French fiduciaire, fiduciaire
  • fiduciaireaccepted as a fixed basis of reference
  • fiduciairebased on having trust
German fiduziell
  • fiduziellaccepted as a fixed basis of reference
Hebrew מְהֵימָן
  • מְהֵימָןaccepted as a fixed basis of reference
Russian базовый, реперный
  • базовый (bazovyj)accepted as a fixed basis of reference
  • реперный (repernyj)accepted as a fixed basis of reference
  • доверительный (doveritelʹnyj)based on having trust
Turkish miyar birimi türünden, ölçü birimi türünden
  • miyar birimi türündenaccepted as a fixed basis of reference
  • ölçü birimi türündenaccepted as a fixed basis of reference
  • güvenenbased on having trust
  • itimat edenbased on having trust
Cite this entry
APA

fiducial. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/fiducial

MLA

“fiducial.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fiducial. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “fiducial,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/fiducial.

Source: fiducial on Wiktionary, CC BY-SA 4.0.